Optimal. Leaf size=69 \[ \frac {1}{3} b^4 \text {erfi}(b x)-\frac {b e^{b^2 x^2}}{6 \sqrt {\pi } x^3}-\frac {b^3 e^{b^2 x^2}}{3 \sqrt {\pi } x}-\frac {\text {erfi}(b x)}{4 x^4} \]
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Rubi [A] time = 0.06, antiderivative size = 69, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, integrand size = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.375, Rules used = {6363, 2214, 2204} \[ \frac {1}{3} b^4 \text {Erfi}(b x)-\frac {b^3 e^{b^2 x^2}}{3 \sqrt {\pi } x}-\frac {b e^{b^2 x^2}}{6 \sqrt {\pi } x^3}-\frac {\text {Erfi}(b x)}{4 x^4} \]
Antiderivative was successfully verified.
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Rule 2204
Rule 2214
Rule 6363
Rubi steps
\begin {align*} \int \frac {\text {erfi}(b x)}{x^5} \, dx &=-\frac {\text {erfi}(b x)}{4 x^4}+\frac {b \int \frac {e^{b^2 x^2}}{x^4} \, dx}{2 \sqrt {\pi }}\\ &=-\frac {b e^{b^2 x^2}}{6 \sqrt {\pi } x^3}-\frac {\text {erfi}(b x)}{4 x^4}+\frac {b^3 \int \frac {e^{b^2 x^2}}{x^2} \, dx}{3 \sqrt {\pi }}\\ &=-\frac {b e^{b^2 x^2}}{6 \sqrt {\pi } x^3}-\frac {b^3 e^{b^2 x^2}}{3 \sqrt {\pi } x}-\frac {\text {erfi}(b x)}{4 x^4}+\frac {\left (2 b^5\right ) \int e^{b^2 x^2} \, dx}{3 \sqrt {\pi }}\\ &=-\frac {b e^{b^2 x^2}}{6 \sqrt {\pi } x^3}-\frac {b^3 e^{b^2 x^2}}{3 \sqrt {\pi } x}+\frac {1}{3} b^4 \text {erfi}(b x)-\frac {\text {erfi}(b x)}{4 x^4}\\ \end {align*}
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Mathematica [A] time = 0.04, size = 51, normalized size = 0.74 \[ \frac {\left (4 b^4 x^4-3\right ) \text {erfi}(b x)-\frac {2 b x e^{b^2 x^2} \left (2 b^2 x^2+1\right )}{\sqrt {\pi }}}{12 x^4} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.55, size = 52, normalized size = 0.75 \[ -\frac {2 \, \sqrt {\pi } {\left (2 \, b^{3} x^{3} + b x\right )} e^{\left (b^{2} x^{2}\right )} + {\left (3 \, \pi - 4 \, \pi b^{4} x^{4}\right )} \operatorname {erfi}\left (b x\right )}{12 \, \pi x^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\operatorname {erfi}\left (b x\right )}{x^{5}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.00, size = 65, normalized size = 0.94 \[ b^{4} \left (-\frac {\erfi \left (b x \right )}{4 b^{4} x^{4}}+\frac {-\frac {{\mathrm e}^{b^{2} x^{2}}}{3 b^{3} x^{3}}-\frac {2 \,{\mathrm e}^{b^{2} x^{2}}}{3 b x}+\frac {2 \sqrt {\pi }\, \erfi \left (b x \right )}{3}}{2 \sqrt {\pi }}\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.38, size = 39, normalized size = 0.57 \[ -\frac {\left (-b^{2} x^{2}\right )^{\frac {3}{2}} b \Gamma \left (-\frac {3}{2}, -b^{2} x^{2}\right )}{4 \, \sqrt {\pi } x^{3}} - \frac {\operatorname {erfi}\left (b x\right )}{4 \, x^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.08, size = 89, normalized size = 1.29 \[ \frac {b\,{\left (-b^2\,x^2\right )}^{3/2}}{3\,x^3}-\frac {\mathrm {erfi}\left (b\,x\right )}{4\,x^4}-\frac {b^3\,{\mathrm {e}}^{b^2\,x^2}}{3\,x\,\sqrt {\pi }}-\frac {b\,{\mathrm {e}}^{b^2\,x^2}}{6\,x^3\,\sqrt {\pi }}-\frac {b\,\mathrm {erfc}\left (\sqrt {-b^2\,x^2}\right )\,{\left (-b^2\,x^2\right )}^{3/2}}{3\,x^3} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 1.10, size = 60, normalized size = 0.87 \[ \frac {b^{4} \operatorname {erfi}{\left (b x \right )}}{3} - \frac {b^{3} e^{b^{2} x^{2}}}{3 \sqrt {\pi } x} - \frac {b e^{b^{2} x^{2}}}{6 \sqrt {\pi } x^{3}} - \frac {\operatorname {erfi}{\left (b x \right )}}{4 x^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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