Integrand size = 12, antiderivative size = 237 \[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=-\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {16 \sqrt {-1+a x} \sqrt {1+a x}}{15 a^3 \sqrt {\text {arccosh}(a x)}}-\frac {24 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \sqrt {\text {arccosh}(a x)}}+\frac {\sqrt {\pi } \text {erf}\left (\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {3 \sqrt {3 \pi } \text {erf}\left (\sqrt {3} \sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {\sqrt {\pi } \text {erfi}\left (\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {3 \sqrt {3 \pi } \text {erfi}\left (\sqrt {3} \sqrt {\text {arccosh}(a x)}\right )}{5 a^3} \]
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Time = 0.55 (sec) , antiderivative size = 237, normalized size of antiderivative = 1.00, number of steps used = 22, number of rules used = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.750, Rules used = {5886, 5951, 5885, 3388, 2211, 2235, 2236, 5880, 5953} \[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\frac {\sqrt {\pi } \text {erf}\left (\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {3 \sqrt {3 \pi } \text {erf}\left (\sqrt {3} \sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {\sqrt {\pi } \text {erfi}\left (\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {3 \sqrt {3 \pi } \text {erfi}\left (\sqrt {3} \sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {16 \sqrt {a x-1} \sqrt {a x+1}}{15 a^3 \sqrt {\text {arccosh}(a x)}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}-\frac {24 x^2 \sqrt {a x-1} \sqrt {a x+1}}{5 a \sqrt {\text {arccosh}(a x)}}-\frac {2 x^2 \sqrt {a x-1} \sqrt {a x+1}}{5 a \text {arccosh}(a x)^{5/2}} \]
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Rule 2211
Rule 2235
Rule 2236
Rule 3388
Rule 5880
Rule 5885
Rule 5886
Rule 5951
Rule 5953
Rubi steps \begin{align*} \text {integral}& = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}-\frac {4 \int \frac {x}{\sqrt {-1+a x} \sqrt {1+a x} \text {arccosh}(a x)^{5/2}} \, dx}{5 a}+\frac {1}{5} (6 a) \int \frac {x^3}{\sqrt {-1+a x} \sqrt {1+a x} \text {arccosh}(a x)^{5/2}} \, dx \\ & = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {12}{5} \int \frac {x^2}{\text {arccosh}(a x)^{3/2}} \, dx-\frac {8 \int \frac {1}{\text {arccosh}(a x)^{3/2}} \, dx}{15 a^2} \\ & = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {16 \sqrt {-1+a x} \sqrt {1+a x}}{15 a^3 \sqrt {\text {arccosh}(a x)}}-\frac {24 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \sqrt {\text {arccosh}(a x)}}-\frac {24 \text {Subst}\left (\int \left (-\frac {\cosh (x)}{4 \sqrt {x}}-\frac {3 \cosh (3 x)}{4 \sqrt {x}}\right ) \, dx,x,\text {arccosh}(a x)\right )}{5 a^3}-\frac {16 \int \frac {x}{\sqrt {-1+a x} \sqrt {1+a x} \sqrt {\text {arccosh}(a x)}} \, dx}{15 a} \\ & = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {16 \sqrt {-1+a x} \sqrt {1+a x}}{15 a^3 \sqrt {\text {arccosh}(a x)}}-\frac {24 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \sqrt {\text {arccosh}(a x)}}-\frac {16 \text {Subst}\left (\int \frac {\cosh (x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{15 a^3}+\frac {6 \text {Subst}\left (\int \frac {\cosh (x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{5 a^3}+\frac {18 \text {Subst}\left (\int \frac {\cosh (3 x)}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{5 a^3} \\ & = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {16 \sqrt {-1+a x} \sqrt {1+a x}}{15 a^3 \sqrt {\text {arccosh}(a x)}}-\frac {24 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \sqrt {\text {arccosh}(a x)}}-\frac {8 \text {Subst}\left (\int \frac {e^{-x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{15 a^3}-\frac {8 \text {Subst}\left (\int \frac {e^x}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{15 a^3}+\frac {3 \text {Subst}\left (\int \frac {e^{-x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{5 a^3}+\frac {3 \text {Subst}\left (\int \frac {e^x}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{5 a^3}+\frac {9 \text {Subst}\left (\int \frac {e^{-3 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{5 a^3}+\frac {9 \text {Subst}\left (\int \frac {e^{3 x}}{\sqrt {x}} \, dx,x,\text {arccosh}(a x)\right )}{5 a^3} \\ & = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {16 \sqrt {-1+a x} \sqrt {1+a x}}{15 a^3 \sqrt {\text {arccosh}(a x)}}-\frac {24 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \sqrt {\text {arccosh}(a x)}}-\frac {16 \text {Subst}\left (\int e^{-x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}-\frac {16 \text {Subst}\left (\int e^{x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {6 \text {Subst}\left (\int e^{-x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {6 \text {Subst}\left (\int e^{x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {18 \text {Subst}\left (\int e^{-3 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {18 \text {Subst}\left (\int e^{3 x^2} \, dx,x,\sqrt {\text {arccosh}(a x)}\right )}{5 a^3} \\ & = -\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \text {arccosh}(a x)^{5/2}}+\frac {8 x}{15 a^2 \text {arccosh}(a x)^{3/2}}-\frac {4 x^3}{5 \text {arccosh}(a x)^{3/2}}+\frac {16 \sqrt {-1+a x} \sqrt {1+a x}}{15 a^3 \sqrt {\text {arccosh}(a x)}}-\frac {24 x^2 \sqrt {-1+a x} \sqrt {1+a x}}{5 a \sqrt {\text {arccosh}(a x)}}+\frac {\sqrt {\pi } \text {erf}\left (\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {3 \sqrt {3 \pi } \text {erf}\left (\sqrt {3} \sqrt {\text {arccosh}(a x)}\right )}{5 a^3}+\frac {\sqrt {\pi } \text {erfi}\left (\sqrt {\text {arccosh}(a x)}\right )}{15 a^3}+\frac {3 \sqrt {3 \pi } \text {erfi}\left (\sqrt {3} \sqrt {\text {arccosh}(a x)}\right )}{5 a^3} \\ \end{align*}
Time = 0.54 (sec) , antiderivative size = 286, normalized size of antiderivative = 1.21 \[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\frac {e^{-3 \text {arccosh}(a x)} \left (-e^{2 \text {arccosh}(a x)} \left (3 e^{\text {arccosh}(a x)} \sqrt {\frac {-1+a x}{1+a x}} (1+a x)+\text {arccosh}(a x)+e^{2 \text {arccosh}(a x)} \text {arccosh}(a x)-2 \text {arccosh}(a x)^2+2 e^{2 \text {arccosh}(a x)} \text {arccosh}(a x)^2-2 e^{\text {arccosh}(a x)} (-\text {arccosh}(a x))^{5/2} \Gamma \left (\frac {1}{2},-\text {arccosh}(a x)\right )+2 e^{\text {arccosh}(a x)} \text {arccosh}(a x)^{5/2} \Gamma \left (\frac {1}{2},\text {arccosh}(a x)\right )\right )-3 \left (\text {arccosh}(a x)+e^{6 \text {arccosh}(a x)} \text {arccosh}(a x)-6 \text {arccosh}(a x)^2+6 e^{6 \text {arccosh}(a x)} \text {arccosh}(a x)^2-6 \sqrt {3} e^{3 \text {arccosh}(a x)} (-\text {arccosh}(a x))^{5/2} \Gamma \left (\frac {1}{2},-3 \text {arccosh}(a x)\right )+6 \sqrt {3} e^{3 \text {arccosh}(a x)} \text {arccosh}(a x)^{5/2} \Gamma \left (\frac {1}{2},3 \text {arccosh}(a x)\right )+e^{3 \text {arccosh}(a x)} \sinh (3 \text {arccosh}(a x))\right )\right )}{30 a^3 \text {arccosh}(a x)^{5/2}} \]
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\[\int \frac {x^{2}}{\operatorname {arccosh}\left (a x \right )^{\frac {7}{2}}}d x\]
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Exception generated. \[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\text {Exception raised: TypeError} \]
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Timed out. \[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\text {Timed out} \]
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\[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\int { \frac {x^{2}}{\operatorname {arcosh}\left (a x\right )^{\frac {7}{2}}} \,d x } \]
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\[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\int { \frac {x^{2}}{\operatorname {arcosh}\left (a x\right )^{\frac {7}{2}}} \,d x } \]
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Timed out. \[ \int \frac {x^2}{\text {arccosh}(a x)^{7/2}} \, dx=\int \frac {x^2}{{\mathrm {acosh}\left (a\,x\right )}^{7/2}} \,d x \]
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