Integrand size = 16, antiderivative size = 283 \[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=-\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (i-a)^2 (i+a) x^2}+\frac {\left (4-9 i a-2 a^2\right ) b^2 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (1+i a) \left (1+a^2\right )^2 x}+\frac {\left (2 a+i \left (1-2 a^2\right )\right ) b^3 \text {arctanh}\left (\frac {\sqrt {i+a} \sqrt {1+i a+i b x}}{\sqrt {i-a} \sqrt {1-i a-i b x}}\right )}{(i-a)^{7/2} (i+a)^{5/2}} \]
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Time = 0.15 (sec) , antiderivative size = 282, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.375, Rules used = {5203, 101, 156, 12, 95, 214} \[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=\frac {\left (-2 i a^2+2 a+i\right ) b^3 \text {arctanh}\left (\frac {\sqrt {a+i} \sqrt {i a+i b x+1}}{\sqrt {-a+i} \sqrt {-i a-i b x+1}}\right )}{(-a+i)^{7/2} (a+i)^{5/2}}+\frac {\left (-2 a^2-9 i a+4\right ) b^2 \sqrt {-i a-i b x+1} \sqrt {i a+i b x+1}}{6 (1+i a) \left (a^2+1\right )^2 x}-\frac {\sqrt {-i a-i b x+1} \sqrt {i a+i b x+1}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {-i a-i b x+1} \sqrt {i a+i b x+1}}{6 (-a+i)^2 (a+i) x^2} \]
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Rule 12
Rule 95
Rule 101
Rule 156
Rule 214
Rule 5203
Rubi steps \begin{align*} \text {integral}& = \int \frac {\sqrt {1-i a-i b x}}{x^4 \sqrt {1+i a+i b x}} \, dx \\ & = -\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {\int \frac {-((3 i+2 a) b)-2 b^2 x}{x^3 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}} \, dx}{3 (1+i a)} \\ & = -\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (i-a)^2 (i+a) x^2}-\frac {\int \frac {\left (4-9 i a-2 a^2\right ) b^2-(3 i+2 a) b^3 x}{x^2 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}} \, dx}{6 (1+i a) \left (1+a^2\right )} \\ & = -\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (i-a)^2 (i+a) x^2}+\frac {\left (4-9 i a-2 a^2\right ) b^2 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (1+i a) \left (1+a^2\right )^2 x}+\frac {\int \frac {3 \left (i+2 a-2 i a^2\right ) b^3}{x \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}} \, dx}{6 (1+i a) \left (1+a^2\right )^2} \\ & = -\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (i-a)^2 (i+a) x^2}+\frac {\left (4-9 i a-2 a^2\right ) b^2 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (1+i a) \left (1+a^2\right )^2 x}-\frac {\left (\left (1-2 i a-2 a^2\right ) b^3\right ) \int \frac {1}{x \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}} \, dx}{2 (i-a)^3 (i+a)^2} \\ & = -\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (i-a)^2 (i+a) x^2}+\frac {\left (4-9 i a-2 a^2\right ) b^2 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (1+i a) \left (1+a^2\right )^2 x}-\frac {\left (\left (1-2 i a-2 a^2\right ) b^3\right ) \text {Subst}\left (\int \frac {1}{-1-i a-(-1+i a) x^2} \, dx,x,\frac {\sqrt {1+i a+i b x}}{\sqrt {1-i a-i b x}}\right )}{(i-a)^3 (i+a)^2} \\ & = -\frac {\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{3 (1+i a) x^3}+\frac {(3-2 i a) b \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (i-a)^2 (i+a) x^2}+\frac {\left (4-9 i a-2 a^2\right ) b^2 \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{6 (1+i a) \left (1+a^2\right )^2 x}+\frac {\left (i+2 a-2 i a^2\right ) b^3 \text {arctanh}\left (\frac {\sqrt {i+a} \sqrt {1+i a+i b x}}{\sqrt {i-a} \sqrt {1-i a-i b x}}\right )}{(i-a)^{7/2} (i+a)^{5/2}} \\ \end{align*}
Time = 0.27 (sec) , antiderivative size = 233, normalized size of antiderivative = 0.82 \[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=\frac {\frac {2 (1+i a) (i+a) (i+a+b x) \sqrt {1+a^2+2 a b x+b^2 x^2}}{x^3}+\frac {(1-4 i a) b (i+a+b x) \sqrt {1+a^2+2 a b x+b^2 x^2}}{x^2}-3 i \left (1-2 i a-2 a^2\right ) b^2 \left (\frac {\sqrt {1+a^2+2 a b x+b^2 x^2}}{(-i+a) x}+\frac {2 b \text {arctanh}\left (\frac {\sqrt {-1-i a} \sqrt {-i (i+a+b x)}}{\sqrt {-1+i a} \sqrt {1+i a+i b x}}\right )}{(-1-i a)^{3/2} \sqrt {-1+i a}}\right )}{6 \left (1+a^2\right )^2} \]
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Time = 0.98 (sec) , antiderivative size = 281, normalized size of antiderivative = 0.99
method | result | size |
risch | \(\frac {i \left (2 a^{2} b^{4} x^{4}+9 i a \,b^{4} x^{4}+2 a^{3} b^{3} x^{3}+15 i a^{2} b^{3} x^{3}+3 i x^{2} a^{3} b^{2}-4 x^{4} b^{4}+2 a^{5} b x -3 i a^{4} b x -10 a \,b^{3} x^{3}-3 i b^{3} x^{3}+2 a^{6}-2 a^{2} b^{2} x^{2}+3 i a \,b^{2} x^{2}+4 a^{3} b x -6 i a^{2} b x +6 a^{4}-2 b^{2} x^{2}+2 a b x -3 b x i+6 a^{2}+2\right )}{6 x^{3} \left (i+a \right )^{2} \left (a -i\right )^{3} \sqrt {b^{2} x^{2}+2 a b x +a^{2}+1}}+\frac {b^{3} \left (2 a^{2}+2 i a -1\right ) \ln \left (\frac {2 a^{2}+2+2 a b x +2 \sqrt {a^{2}+1}\, \sqrt {b^{2} x^{2}+2 a b x +a^{2}+1}}{x}\right )}{2 \left (a^{2}+1\right )^{\frac {5}{2}} \left (a -i\right )}\) | \(281\) |
default | \(\text {Expression too large to display}\) | \(1511\) |
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Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 690 vs. \(2 (194) = 388\).
Time = 0.29 (sec) , antiderivative size = 690, normalized size of antiderivative = 2.44 \[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=\frac {{\left (2 i \, a^{2} - 9 \, a - 4 i\right )} b^{3} x^{3} - 3 \, \sqrt {\frac {{\left (4 \, a^{4} + 8 i \, a^{3} - 8 \, a^{2} - 4 i \, a + 1\right )} b^{6}}{a^{12} - 2 i \, a^{11} + 4 \, a^{10} - 10 i \, a^{9} + 5 \, a^{8} - 20 i \, a^{7} - 20 i \, a^{5} - 5 \, a^{4} - 10 i \, a^{3} - 4 \, a^{2} - 2 i \, a - 1}} {\left (a^{5} - i \, a^{4} + 2 \, a^{3} - 2 i \, a^{2} + a - i\right )} x^{3} \log \left (-\frac {{\left (2 \, a^{2} + 2 i \, a - 1\right )} b^{4} x - \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} {\left (2 \, a^{2} + 2 i \, a - 1\right )} b^{3} + {\left (a^{7} - i \, a^{6} + 3 \, a^{5} - 3 i \, a^{4} + 3 \, a^{3} - 3 i \, a^{2} + a - i\right )} \sqrt {\frac {{\left (4 \, a^{4} + 8 i \, a^{3} - 8 \, a^{2} - 4 i \, a + 1\right )} b^{6}}{a^{12} - 2 i \, a^{11} + 4 \, a^{10} - 10 i \, a^{9} + 5 \, a^{8} - 20 i \, a^{7} - 20 i \, a^{5} - 5 \, a^{4} - 10 i \, a^{3} - 4 \, a^{2} - 2 i \, a - 1}}}{{\left (2 \, a^{2} + 2 i \, a - 1\right )} b^{3}}\right ) + 3 \, \sqrt {\frac {{\left (4 \, a^{4} + 8 i \, a^{3} - 8 \, a^{2} - 4 i \, a + 1\right )} b^{6}}{a^{12} - 2 i \, a^{11} + 4 \, a^{10} - 10 i \, a^{9} + 5 \, a^{8} - 20 i \, a^{7} - 20 i \, a^{5} - 5 \, a^{4} - 10 i \, a^{3} - 4 \, a^{2} - 2 i \, a - 1}} {\left (a^{5} - i \, a^{4} + 2 \, a^{3} - 2 i \, a^{2} + a - i\right )} x^{3} \log \left (-\frac {{\left (2 \, a^{2} + 2 i \, a - 1\right )} b^{4} x - \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} {\left (2 \, a^{2} + 2 i \, a - 1\right )} b^{3} - {\left (a^{7} - i \, a^{6} + 3 \, a^{5} - 3 i \, a^{4} + 3 \, a^{3} - 3 i \, a^{2} + a - i\right )} \sqrt {\frac {{\left (4 \, a^{4} + 8 i \, a^{3} - 8 \, a^{2} - 4 i \, a + 1\right )} b^{6}}{a^{12} - 2 i \, a^{11} + 4 \, a^{10} - 10 i \, a^{9} + 5 \, a^{8} - 20 i \, a^{7} - 20 i \, a^{5} - 5 \, a^{4} - 10 i \, a^{3} - 4 \, a^{2} - 2 i \, a - 1}}}{{\left (2 \, a^{2} + 2 i \, a - 1\right )} b^{3}}\right ) + {\left ({\left (2 i \, a^{2} - 9 \, a - 4 i\right )} b^{2} x^{2} + 2 i \, a^{4} + {\left (-2 i \, a^{3} + 3 \, a^{2} - 2 i \, a + 3\right )} b x + 4 i \, a^{2} + 2 i\right )} \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1}}{6 \, {\left (a^{5} - i \, a^{4} + 2 \, a^{3} - 2 i \, a^{2} + a - i\right )} x^{3}} \]
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\[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=- i \int \frac {\sqrt {a^{2} + 2 a b x + b^{2} x^{2} + 1}}{a x^{4} + b x^{5} - i x^{4}}\, dx \]
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\[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=\int { \frac {\sqrt {{\left (b x + a\right )}^{2} + 1}}{{\left (i \, b x + i \, a + 1\right )} x^{4}} \,d x } \]
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Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 884 vs. \(2 (194) = 388\).
Time = 0.34 (sec) , antiderivative size = 884, normalized size of antiderivative = 3.12 \[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=\text {Too large to display} \]
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Timed out. \[ \int \frac {e^{-i \arctan (a+b x)}}{x^4} \, dx=\int \frac {\sqrt {{\left (a+b\,x\right )}^2+1}}{x^4\,\left (1+a\,1{}\mathrm {i}+b\,x\,1{}\mathrm {i}\right )} \,d x \]
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