Integrand size = 16, antiderivative size = 276 \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=-\frac {\left (3 i-12 a-24 i a^2+16 a^3+8 i a^4\right ) \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{8 b^5}+\frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}-\frac {(1-i a-i b x)^{3/2} \sqrt {1+i a+i b x} \left (19 i-114 a-86 i a^2+96 a^3+2 \left (13+14 i a-36 a^2\right ) b x\right )}{120 b^5}+\frac {\left (3+12 i a-24 a^2-16 i a^3+8 a^4\right ) \text {arcsinh}(a+b x)}{8 b^5} \]
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Time = 0.16 (sec) , antiderivative size = 276, normalized size of antiderivative = 1.00, number of steps used = 8, number of rules used = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {5203, 102, 158, 152, 52, 55, 633, 221} \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=-\frac {(-i a-i b x+1)^{3/2} \sqrt {i a+i b x+1} \left (96 a^3+2 \left (-36 a^2+14 i a+13\right ) b x-86 i a^2-114 a+19 i\right )}{120 b^5}+\frac {\left (8 a^4-16 i a^3-24 a^2+12 i a+3\right ) \text {arcsinh}(a+b x)}{8 b^5}-\frac {\left (8 i a^4+16 a^3-24 i a^2-12 a+3 i\right ) \sqrt {-i a-i b x+1} \sqrt {i a+i b x+1}}{8 b^5}+\frac {(-8 a+i) x^2 (-i a-i b x+1)^{3/2} \sqrt {i a+i b x+1}}{20 b^3}+\frac {x^3 (-i a-i b x+1)^{3/2} \sqrt {i a+i b x+1}}{5 b^2} \]
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Rule 52
Rule 55
Rule 102
Rule 152
Rule 158
Rule 221
Rule 633
Rule 5203
Rubi steps \begin{align*} \text {integral}& = \int \frac {x^4 \sqrt {1-i a-i b x}}{\sqrt {1+i a+i b x}} \, dx \\ & = \frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}+\frac {\int \frac {x^2 \sqrt {1-i a-i b x} \left (-3 \left (1+a^2\right )+(i-8 a) b x\right )}{\sqrt {1+i a+i b x}} \, dx}{5 b^2} \\ & = \frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}+\frac {\int \frac {x \sqrt {1-i a-i b x} \left (2 (i-8 a) (i-a) (i+a) b-\left (13+14 i a-36 a^2\right ) b^2 x\right )}{\sqrt {1+i a+i b x}} \, dx}{20 b^4} \\ & = \frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}-\frac {(1-i a-i b x)^{3/2} \sqrt {1+i a+i b x} \left (19 i-114 a-86 i a^2+96 a^3+2 \left (13+14 i a-36 a^2\right ) b x\right )}{120 b^5}+\frac {\left (3+12 i a-24 a^2-16 i a^3+8 a^4\right ) \int \frac {\sqrt {1-i a-i b x}}{\sqrt {1+i a+i b x}} \, dx}{8 b^4} \\ & = -\frac {\left (3 i-12 a-24 i a^2+16 a^3+8 i a^4\right ) \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{8 b^5}+\frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}-\frac {(1-i a-i b x)^{3/2} \sqrt {1+i a+i b x} \left (19 i-114 a-86 i a^2+96 a^3+2 \left (13+14 i a-36 a^2\right ) b x\right )}{120 b^5}+\frac {\left (3+12 i a-24 a^2-16 i a^3+8 a^4\right ) \int \frac {1}{\sqrt {1-i a-i b x} \sqrt {1+i a+i b x}} \, dx}{8 b^4} \\ & = -\frac {\left (3 i-12 a-24 i a^2+16 a^3+8 i a^4\right ) \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{8 b^5}+\frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}-\frac {(1-i a-i b x)^{3/2} \sqrt {1+i a+i b x} \left (19 i-114 a-86 i a^2+96 a^3+2 \left (13+14 i a-36 a^2\right ) b x\right )}{120 b^5}+\frac {\left (3+12 i a-24 a^2-16 i a^3+8 a^4\right ) \int \frac {1}{\sqrt {(1-i a) (1+i a)+2 a b x+b^2 x^2}} \, dx}{8 b^4} \\ & = -\frac {\left (3 i-12 a-24 i a^2+16 a^3+8 i a^4\right ) \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{8 b^5}+\frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}-\frac {(1-i a-i b x)^{3/2} \sqrt {1+i a+i b x} \left (19 i-114 a-86 i a^2+96 a^3+2 \left (13+14 i a-36 a^2\right ) b x\right )}{120 b^5}+\frac {\left (3+12 i a-24 a^2-16 i a^3+8 a^4\right ) \text {Subst}\left (\int \frac {1}{\sqrt {1+\frac {x^2}{4 b^2}}} \, dx,x,2 a b+2 b^2 x\right )}{16 b^6} \\ & = -\frac {\left (3 i-12 a-24 i a^2+16 a^3+8 i a^4\right ) \sqrt {1-i a-i b x} \sqrt {1+i a+i b x}}{8 b^5}+\frac {(i-8 a) x^2 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{20 b^3}+\frac {x^3 (1-i a-i b x)^{3/2} \sqrt {1+i a+i b x}}{5 b^2}-\frac {(1-i a-i b x)^{3/2} \sqrt {1+i a+i b x} \left (19 i-114 a-86 i a^2+96 a^3+2 \left (13+14 i a-36 a^2\right ) b x\right )}{120 b^5}+\frac {\left (3+12 i a-24 a^2-16 i a^3+8 a^4\right ) \text {arcsinh}(a+b x)}{8 b^5} \\ \end{align*}
Time = 0.62 (sec) , antiderivative size = 248, normalized size of antiderivative = 0.90 \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=\frac {i \sqrt {1+i a+i b x} \left (-64+226 a^4+24 i a^5+109 i b x+77 b^2 x^2-62 i b^3 x^3-54 b^4 x^4+24 i b^5 x^5+2 a^3 (-41 i+72 b x)+a^2 \left (57-346 i b x-84 b^2 x^2\right )+a \left (-211 i-346 b x+154 i b^2 x^2+64 b^3 x^3\right )\right )}{120 b^5 \sqrt {-i (i+a+b x)}}+\frac {\sqrt [4]{-1} \left (-3 i+12 a+24 i a^2-16 a^3-8 i a^4\right ) \text {arcsinh}\left (\frac {\left (\frac {1}{2}+\frac {i}{2}\right ) \sqrt {b} \sqrt {-i (i+a+b x)}}{\sqrt {-i b}}\right )}{4 \sqrt {-i b} b^{9/2}} \]
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Time = 0.84 (sec) , antiderivative size = 197, normalized size of antiderivative = 0.71
method | result | size |
risch | \(-\frac {i \left (24 x^{4} b^{4}-24 a \,b^{3} x^{3}+30 i b^{3} x^{3}+24 a^{2} b^{2} x^{2}-70 i a \,b^{2} x^{2}-24 a^{3} b x +130 i a^{2} b x +24 a^{4}-250 i a^{3}-32 b^{2} x^{2}+116 a b x -45 b x i-332 a^{2}+275 i a +64\right ) \sqrt {b^{2} x^{2}+2 a b x +a^{2}+1}}{120 b^{5}}+\frac {\left (8 a^{4}-16 i a^{3}-24 a^{2}+12 i a +3\right ) \ln \left (\frac {b^{2} x +a b}{\sqrt {b^{2}}}+\sqrt {b^{2} x^{2}+2 a b x +a^{2}+1}\right )}{8 b^{4} \sqrt {b^{2}}}\) | \(197\) |
default | \(\text {Expression too large to display}\) | \(1152\) |
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Time = 0.27 (sec) , antiderivative size = 177, normalized size of antiderivative = 0.64 \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=\frac {-186 i \, a^{5} - 1345 \, a^{4} + 1730 i \, a^{3} + 1320 \, a^{2} - 120 \, {\left (8 \, a^{4} - 16 i \, a^{3} - 24 \, a^{2} + 12 i \, a + 3\right )} \log \left (-b x - a + \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1}\right ) - 8 \, {\left (24 i \, b^{4} x^{4} + 6 \, {\left (-4 i \, a - 5\right )} b^{3} x^{3} + 2 \, {\left (12 i \, a^{2} + 35 \, a - 16 i\right )} b^{2} x^{2} + 24 i \, a^{4} + 250 \, a^{3} + {\left (-24 i \, a^{3} - 130 \, a^{2} + 116 i \, a + 45\right )} b x - 332 i \, a^{2} - 275 \, a + 64 i\right )} \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} - 300 i \, a}{960 \, b^{5}} \]
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\[ \int e^{-i \arctan (a+b x)} x^4 \, dx=- i \int \frac {x^{4} \sqrt {a^{2} + 2 a b x + b^{2} x^{2} + 1}}{a + b x - i}\, dx \]
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Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 456 vs. \(2 (200) = 400\).
Time = 0.28 (sec) , antiderivative size = 456, normalized size of antiderivative = 1.65 \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=\frac {2 i \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a^{3} x}{b^{4}} - \frac {i \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}^{\frac {3}{2}} x^{2}}{5 \, b^{3}} + \frac {a^{4} \operatorname {arsinh}\left (b x + a\right )}{b^{5}} + \frac {i \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a^{4}}{b^{5}} + \frac {3 i \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}^{\frac {3}{2}} a x}{5 \, b^{4}} + \frac {3 \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a^{2} x}{b^{4}} - \frac {2 i \, a^{3} \operatorname {arsinh}\left (b x + a\right )}{b^{5}} - \frac {6 i \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}^{\frac {3}{2}} a^{2}}{5 \, b^{5}} - \frac {\sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a^{3}}{b^{5}} + \frac {{\left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}^{\frac {3}{2}} x}{4 \, b^{4}} - \frac {5 i \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a x}{2 \, b^{4}} - \frac {3 \, a^{2} \operatorname {arsinh}\left (b x + a\right )}{b^{5}} - \frac {13 \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}^{\frac {3}{2}} a}{12 \, b^{5}} + \frac {7 i \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a^{2}}{2 \, b^{5}} - \frac {5 \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} x}{8 \, b^{4}} + \frac {3 i \, a \operatorname {arsinh}\left (b x + a\right )}{2 \, b^{5}} + \frac {7 i \, {\left (b^{2} x^{2} + 2 \, a b x + a^{2} + 1\right )}^{\frac {3}{2}}}{15 \, b^{5}} + \frac {27 \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1} a}{8 \, b^{5}} + \frac {3 \, \operatorname {arsinh}\left (b x + a\right )}{8 \, b^{5}} - \frac {i \, \sqrt {b^{2} x^{2} + 2 \, a b x + a^{2} + 1}}{b^{5}} \]
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Time = 0.32 (sec) , antiderivative size = 205, normalized size of antiderivative = 0.74 \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=-\frac {1}{120} \, \sqrt {{\left (b x + a\right )}^{2} + 1} {\left ({\left (2 \, {\left (3 \, x {\left (\frac {4 i \, x}{b} - \frac {4 i \, a b^{7} + 5 \, b^{7}}{b^{9}}\right )} - \frac {-12 i \, a^{2} b^{6} - 35 \, a b^{6} + 16 i \, b^{6}}{b^{9}}\right )} x - \frac {24 i \, a^{3} b^{5} + 130 \, a^{2} b^{5} - 116 i \, a b^{5} - 45 \, b^{5}}{b^{9}}\right )} x - \frac {-24 i \, a^{4} b^{4} - 250 \, a^{3} b^{4} + 332 i \, a^{2} b^{4} + 275 \, a b^{4} - 64 i \, b^{4}}{b^{9}}\right )} - \frac {{\left (8 \, a^{4} - 16 i \, a^{3} - 24 \, a^{2} + 12 i \, a + 3\right )} \log \left (-a b - {\left (x {\left | b \right |} - \sqrt {{\left (b x + a\right )}^{2} + 1}\right )} {\left | b \right |}\right )}{8 \, b^{4} {\left | b \right |}} \]
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Timed out. \[ \int e^{-i \arctan (a+b x)} x^4 \, dx=\int \frac {x^4\,\sqrt {{\left (a+b\,x\right )}^2+1}}{1+a\,1{}\mathrm {i}+b\,x\,1{}\mathrm {i}} \,d x \]
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