Optimal. Leaf size=115 \[ \frac{4 b^5 e^c x^2 \text{HypergeometricPFQ}\left (\{1,1\},\left \{\frac{3}{2},2\right \},b^2 x^2\right )}{3 \sqrt{\pi }}-\frac{2 b^2 e^{b^2 x^2+c} \text{Erf}(b x)}{3 x}-\frac{e^{b^2 x^2+c} \text{Erf}(b x)}{3 x^3}+\frac{4 b^3 e^c \log (x)}{3 \sqrt{\pi }}-\frac{b e^c}{3 \sqrt{\pi } x^2} \]
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Rubi [A] time = 0.10828, antiderivative size = 115, normalized size of antiderivative = 1., number of steps used = 7, number of rules used = 5, integrand size = 19, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.263, Rules used = {6391, 6376, 12, 29, 30} \[ \frac{4 b^5 e^c x^2 \, _2F_2\left (1,1;\frac{3}{2},2;b^2 x^2\right )}{3 \sqrt{\pi }}-\frac{2 b^2 e^{b^2 x^2+c} \text{Erf}(b x)}{3 x}-\frac{e^{b^2 x^2+c} \text{Erf}(b x)}{3 x^3}+\frac{4 b^3 e^c \log (x)}{3 \sqrt{\pi }}-\frac{b e^c}{3 \sqrt{\pi } x^2} \]
Antiderivative was successfully verified.
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Rule 6391
Rule 6376
Rule 12
Rule 29
Rule 30
Rubi steps
\begin{align*} \int \frac{e^{c+b^2 x^2} \text{erf}(b x)}{x^4} \, dx &=-\frac{e^{c+b^2 x^2} \text{erf}(b x)}{3 x^3}+\frac{1}{3} \left (2 b^2\right ) \int \frac{e^{c+b^2 x^2} \text{erf}(b x)}{x^2} \, dx+\frac{(2 b) \int \frac{e^c}{x^3} \, dx}{3 \sqrt{\pi }}\\ &=-\frac{e^{c+b^2 x^2} \text{erf}(b x)}{3 x^3}-\frac{2 b^2 e^{c+b^2 x^2} \text{erf}(b x)}{3 x}+\frac{1}{3} \left (4 b^4\right ) \int e^{c+b^2 x^2} \text{erf}(b x) \, dx+\frac{\left (4 b^3\right ) \int \frac{e^c}{x} \, dx}{3 \sqrt{\pi }}+\frac{\left (2 b e^c\right ) \int \frac{1}{x^3} \, dx}{3 \sqrt{\pi }}\\ &=-\frac{b e^c}{3 \sqrt{\pi } x^2}-\frac{e^{c+b^2 x^2} \text{erf}(b x)}{3 x^3}-\frac{2 b^2 e^{c+b^2 x^2} \text{erf}(b x)}{3 x}+\frac{4 b^5 e^c x^2 \, _2F_2\left (1,1;\frac{3}{2},2;b^2 x^2\right )}{3 \sqrt{\pi }}+\frac{\left (4 b^3 e^c\right ) \int \frac{1}{x} \, dx}{3 \sqrt{\pi }}\\ &=-\frac{b e^c}{3 \sqrt{\pi } x^2}-\frac{e^{c+b^2 x^2} \text{erf}(b x)}{3 x^3}-\frac{2 b^2 e^{c+b^2 x^2} \text{erf}(b x)}{3 x}+\frac{4 b^5 e^c x^2 \, _2F_2\left (1,1;\frac{3}{2},2;b^2 x^2\right )}{3 \sqrt{\pi }}+\frac{4 b^3 e^c \log (x)}{3 \sqrt{\pi }}\\ \end{align*}
Mathematica [A] time = 0.340162, size = 100, normalized size = 0.87 \[ -\frac{e^c \left (4 b^5 x^5 \text{HypergeometricPFQ}\left (\{1,1\},\left \{\frac{3}{2},2\right \},-b^2 x^2\right )-2 \pi b^3 x^3 \text{Erf}(b x) \text{Erfi}(b x)+\sqrt{\pi } e^{b^2 x^2} \left (2 b^2 x^2+1\right ) \text{Erf}(b x)-4 b^3 x^3 \log (x)+b x\right )}{3 \sqrt{\pi } x^3} \]
Antiderivative was successfully verified.
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Maple [F] time = 0.273, size = 0, normalized size = 0. \begin{align*} \int{\frac{{{\rm e}^{{b}^{2}{x}^{2}+c}}{\it Erf} \left ( bx \right ) }{{x}^{4}}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{\operatorname{erf}\left (b x\right ) e^{\left (b^{2} x^{2} + c\right )}}{x^{4}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [F] time = 0., size = 0, normalized size = 0. \begin{align*}{\rm integral}\left (\frac{\operatorname{erf}\left (b x\right ) e^{\left (b^{2} x^{2} + c\right )}}{x^{4}}, x\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{\operatorname{erf}\left (b x\right ) e^{\left (b^{2} x^{2} + c\right )}}{x^{4}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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