Integrand size = 14, antiderivative size = 137 \[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=-\frac {3 b^3 c \sqrt {1-\frac {1}{c^2 x^2}}}{8 x}+\frac {3}{8} b^3 c^2 \sec ^{-1}(c x)-\frac {3}{4} b^2 \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )+\frac {3 b c \sqrt {1-\frac {1}{c^2 x^2}} \left (a+b \sec ^{-1}(c x)\right )^2}{4 x}-\frac {1}{4} c^2 \left (a+b \sec ^{-1}(c x)\right )^3+\frac {1}{2} \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )^3 \]
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Time = 0.08 (sec) , antiderivative size = 137, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.429, Rules used = {5330, 4489, 3392, 32, 2715, 8} \[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=-\frac {3}{4} b^2 \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )+\frac {3 b c \sqrt {1-\frac {1}{c^2 x^2}} \left (a+b \sec ^{-1}(c x)\right )^2}{4 x}+\frac {1}{2} \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )^3-\frac {1}{4} c^2 \left (a+b \sec ^{-1}(c x)\right )^3-\frac {3 b^3 c \sqrt {1-\frac {1}{c^2 x^2}}}{8 x}+\frac {3}{8} b^3 c^2 \sec ^{-1}(c x) \]
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Rule 8
Rule 32
Rule 2715
Rule 3392
Rule 4489
Rule 5330
Rubi steps \begin{align*} \text {integral}& = c^2 \text {Subst}\left (\int (a+b x)^3 \cos (x) \sin (x) \, dx,x,\sec ^{-1}(c x)\right ) \\ & = \frac {1}{2} \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )^3-\frac {1}{2} \left (3 b c^2\right ) \text {Subst}\left (\int (a+b x)^2 \sin ^2(x) \, dx,x,\sec ^{-1}(c x)\right ) \\ & = -\frac {3}{4} b^2 \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )+\frac {3 b c \sqrt {1-\frac {1}{c^2 x^2}} \left (a+b \sec ^{-1}(c x)\right )^2}{4 x}+\frac {1}{2} \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )^3-\frac {1}{4} \left (3 b c^2\right ) \text {Subst}\left (\int (a+b x)^2 \, dx,x,\sec ^{-1}(c x)\right )+\frac {1}{4} \left (3 b^3 c^2\right ) \text {Subst}\left (\int \sin ^2(x) \, dx,x,\sec ^{-1}(c x)\right ) \\ & = -\frac {3 b^3 c \sqrt {1-\frac {1}{c^2 x^2}}}{8 x}-\frac {3}{4} b^2 \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )+\frac {3 b c \sqrt {1-\frac {1}{c^2 x^2}} \left (a+b \sec ^{-1}(c x)\right )^2}{4 x}-\frac {1}{4} c^2 \left (a+b \sec ^{-1}(c x)\right )^3+\frac {1}{2} \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )^3+\frac {1}{8} \left (3 b^3 c^2\right ) \text {Subst}\left (\int 1 \, dx,x,\sec ^{-1}(c x)\right ) \\ & = -\frac {3 b^3 c \sqrt {1-\frac {1}{c^2 x^2}}}{8 x}+\frac {3}{8} b^3 c^2 \sec ^{-1}(c x)-\frac {3}{4} b^2 \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )+\frac {3 b c \sqrt {1-\frac {1}{c^2 x^2}} \left (a+b \sec ^{-1}(c x)\right )^2}{4 x}-\frac {1}{4} c^2 \left (a+b \sec ^{-1}(c x)\right )^3+\frac {1}{2} \left (c^2-\frac {1}{x^2}\right ) \left (a+b \sec ^{-1}(c x)\right )^3 \\ \end{align*}
Time = 0.14 (sec) , antiderivative size = 185, normalized size of antiderivative = 1.35 \[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=\frac {-4 a^3+6 a b^2+6 a^2 b c \sqrt {1-\frac {1}{c^2 x^2}} x-3 b^3 c \sqrt {1-\frac {1}{c^2 x^2}} x+6 b \left (-2 a^2+b^2+2 a b c \sqrt {1-\frac {1}{c^2 x^2}} x\right ) \sec ^{-1}(c x)+6 b^2 \left (b c \sqrt {1-\frac {1}{c^2 x^2}} x+a \left (-2+c^2 x^2\right )\right ) \sec ^{-1}(c x)^2+2 b^3 \left (-2+c^2 x^2\right ) \sec ^{-1}(c x)^3+3 b \left (-2 a^2+b^2\right ) c^2 x^2 \arcsin \left (\frac {1}{c x}\right )}{8 x^2} \]
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Leaf count of result is larger than twice the leaf count of optimal. \(292\) vs. \(2(121)=242\).
Time = 0.81 (sec) , antiderivative size = 293, normalized size of antiderivative = 2.14
method | result | size |
derivativedivides | \(c^{2} \left (-\frac {a^{3}}{2 c^{2} x^{2}}+b^{3} \left (-\frac {\operatorname {arcsec}\left (c x \right )^{3}}{2 c^{2} x^{2}}+\frac {3 \operatorname {arcsec}\left (c x \right )^{2} \left (c x \,\operatorname {arcsec}\left (c x \right )+\sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\right )}{4 c x}+\frac {3 \,\operatorname {arcsec}\left (c x \right )}{4 c^{2} x^{2}}-\frac {3 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}}{8 c x}-\frac {3 \,\operatorname {arcsec}\left (c x \right )}{8}-\frac {\operatorname {arcsec}\left (c x \right )^{3}}{2}\right )+3 a \,b^{2} \left (-\frac {\operatorname {arcsec}\left (c x \right )^{2}}{2 c^{2} x^{2}}+\frac {\operatorname {arcsec}\left (c x \right ) \left (c x \,\operatorname {arcsec}\left (c x \right )+\sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\right )}{2 c x}-\frac {\operatorname {arcsec}\left (c x \right )^{2}}{4}-\frac {1}{4}+\frac {1}{4 c^{2} x^{2}}\right )+3 a^{2} b \left (-\frac {\operatorname {arcsec}\left (c x \right )}{2 c^{2} x^{2}}-\frac {\sqrt {c^{2} x^{2}-1}\, \left (\arctan \left (\frac {1}{\sqrt {c^{2} x^{2}-1}}\right ) c^{2} x^{2}-\sqrt {c^{2} x^{2}-1}\right )}{4 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\, x^{3} c^{3}}\right )\right )\) | \(293\) |
default | \(c^{2} \left (-\frac {a^{3}}{2 c^{2} x^{2}}+b^{3} \left (-\frac {\operatorname {arcsec}\left (c x \right )^{3}}{2 c^{2} x^{2}}+\frac {3 \operatorname {arcsec}\left (c x \right )^{2} \left (c x \,\operatorname {arcsec}\left (c x \right )+\sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\right )}{4 c x}+\frac {3 \,\operatorname {arcsec}\left (c x \right )}{4 c^{2} x^{2}}-\frac {3 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}}{8 c x}-\frac {3 \,\operatorname {arcsec}\left (c x \right )}{8}-\frac {\operatorname {arcsec}\left (c x \right )^{3}}{2}\right )+3 a \,b^{2} \left (-\frac {\operatorname {arcsec}\left (c x \right )^{2}}{2 c^{2} x^{2}}+\frac {\operatorname {arcsec}\left (c x \right ) \left (c x \,\operatorname {arcsec}\left (c x \right )+\sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\right )}{2 c x}-\frac {\operatorname {arcsec}\left (c x \right )^{2}}{4}-\frac {1}{4}+\frac {1}{4 c^{2} x^{2}}\right )+3 a^{2} b \left (-\frac {\operatorname {arcsec}\left (c x \right )}{2 c^{2} x^{2}}-\frac {\sqrt {c^{2} x^{2}-1}\, \left (\arctan \left (\frac {1}{\sqrt {c^{2} x^{2}-1}}\right ) c^{2} x^{2}-\sqrt {c^{2} x^{2}-1}\right )}{4 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\, x^{3} c^{3}}\right )\right )\) | \(293\) |
parts | \(-\frac {a^{3}}{2 x^{2}}+b^{3} c^{2} \left (-\frac {\operatorname {arcsec}\left (c x \right )^{3}}{2 c^{2} x^{2}}+\frac {3 \operatorname {arcsec}\left (c x \right )^{2} \left (c x \,\operatorname {arcsec}\left (c x \right )+\sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\right )}{4 c x}+\frac {3 \,\operatorname {arcsec}\left (c x \right )}{4 c^{2} x^{2}}-\frac {3 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}}{8 c x}-\frac {3 \,\operatorname {arcsec}\left (c x \right )}{8}-\frac {\operatorname {arcsec}\left (c x \right )^{3}}{2}\right )+3 a \,b^{2} c^{2} \left (-\frac {\operatorname {arcsec}\left (c x \right )^{2}}{2 c^{2} x^{2}}+\frac {\operatorname {arcsec}\left (c x \right ) \left (c x \,\operatorname {arcsec}\left (c x \right )+\sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\right )}{2 c x}-\frac {\operatorname {arcsec}\left (c x \right )^{2}}{4}-\frac {1}{4}+\frac {1}{4 c^{2} x^{2}}\right )+3 a^{2} b \,c^{2} \left (-\frac {\operatorname {arcsec}\left (c x \right )}{2 c^{2} x^{2}}-\frac {\sqrt {c^{2} x^{2}-1}\, \left (\arctan \left (\frac {1}{\sqrt {c^{2} x^{2}-1}}\right ) c^{2} x^{2}-\sqrt {c^{2} x^{2}-1}\right )}{4 \sqrt {\frac {c^{2} x^{2}-1}{c^{2} x^{2}}}\, x^{3} c^{3}}\right )\) | \(295\) |
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Time = 0.27 (sec) , antiderivative size = 150, normalized size of antiderivative = 1.09 \[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=\frac {2 \, {\left (b^{3} c^{2} x^{2} - 2 \, b^{3}\right )} \operatorname {arcsec}\left (c x\right )^{3} - 4 \, a^{3} + 6 \, a b^{2} + 6 \, {\left (a b^{2} c^{2} x^{2} - 2 \, a b^{2}\right )} \operatorname {arcsec}\left (c x\right )^{2} + 3 \, {\left ({\left (2 \, a^{2} b - b^{3}\right )} c^{2} x^{2} - 4 \, a^{2} b + 2 \, b^{3}\right )} \operatorname {arcsec}\left (c x\right ) + 3 \, {\left (2 \, b^{3} \operatorname {arcsec}\left (c x\right )^{2} + 4 \, a b^{2} \operatorname {arcsec}\left (c x\right ) + 2 \, a^{2} b - b^{3}\right )} \sqrt {c^{2} x^{2} - 1}}{8 \, x^{2}} \]
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\[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=\int \frac {\left (a + b \operatorname {asec}{\left (c x \right )}\right )^{3}}{x^{3}}\, dx \]
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\[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=\int { \frac {{\left (b \operatorname {arcsec}\left (c x\right ) + a\right )}^{3}}{x^{3}} \,d x } \]
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Leaf count of result is larger than twice the leaf count of optimal. 278 vs. \(2 (121) = 242\).
Time = 0.30 (sec) , antiderivative size = 278, normalized size of antiderivative = 2.03 \[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=\frac {1}{8} \, {\left (2 \, b^{3} c \arccos \left (\frac {1}{c x}\right )^{3} + 6 \, a b^{2} c \arccos \left (\frac {1}{c x}\right )^{2} + 6 \, a^{2} b c \arccos \left (\frac {1}{c x}\right ) - 3 \, b^{3} c \arccos \left (\frac {1}{c x}\right ) + \frac {6 \, b^{3} \sqrt {-\frac {1}{c^{2} x^{2}} + 1} \arccos \left (\frac {1}{c x}\right )^{2}}{x} - 3 \, a b^{2} c + \frac {12 \, a b^{2} \sqrt {-\frac {1}{c^{2} x^{2}} + 1} \arccos \left (\frac {1}{c x}\right )}{x} - \frac {4 \, b^{3} \arccos \left (\frac {1}{c x}\right )^{3}}{c x^{2}} + \frac {6 \, a^{2} b \sqrt {-\frac {1}{c^{2} x^{2}} + 1}}{x} - \frac {3 \, b^{3} \sqrt {-\frac {1}{c^{2} x^{2}} + 1}}{x} - \frac {12 \, a b^{2} \arccos \left (\frac {1}{c x}\right )^{2}}{c x^{2}} - \frac {12 \, a^{2} b \arccos \left (\frac {1}{c x}\right )}{c x^{2}} + \frac {6 \, b^{3} \arccos \left (\frac {1}{c x}\right )}{c x^{2}} - \frac {4 \, a^{3}}{c x^{2}} + \frac {6 \, a b^{2}}{c x^{2}}\right )} c \]
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Timed out. \[ \int \frac {\left (a+b \sec ^{-1}(c x)\right )^3}{x^3} \, dx=\int \frac {{\left (a+b\,\mathrm {acos}\left (\frac {1}{c\,x}\right )\right )}^3}{x^3} \,d x \]
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