Optimal. Leaf size=115 \[ \frac {4 b^5 e^c x^2 \, _2F_2\left (1,1;\frac {3}{2},2;b^2 x^2\right )}{3 \sqrt {\pi }}+\frac {4 b^3 e^c \log (x)}{3 \sqrt {\pi }}-\frac {2 b^2 e^{b^2 x^2+c} \text {erf}(b x)}{3 x}-\frac {e^{b^2 x^2+c} \text {erf}(b x)}{3 x^3}-\frac {b e^c}{3 \sqrt {\pi } x^2} \]
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Rubi [A] time = 0.11, antiderivative size = 115, normalized size of antiderivative = 1.00, 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 12
Rule 29
Rule 30
Rule 6376
Rule 6391
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*}
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Mathematica [A] time = 0.38, size = 100, normalized size = 0.87 \[ -\frac {e^c \left (4 b^5 x^5 \, _2F_2\left (1,1;\frac {3}{2},2;-b^2 x^2\right )-2 \pi b^3 x^3 \text {erf}(b x) \text {erfi}(b x)-4 b^3 x^3 \log (x)+\sqrt {\pi } e^{b^2 x^2} \left (2 b^2 x^2+1\right ) \text {erf}(b x)+b x\right )}{3 \sqrt {\pi } x^3} \]
Antiderivative was successfully verified.
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fricas [F] time = 0.51, size = 0, normalized size = 0.00 \[ {\rm integral}\left (\frac {\operatorname {erf}\left (b x\right ) e^{\left (b^{2} x^{2} + c\right )}}{x^{4}}, x\right ) \]
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 \[ \int \frac {\operatorname {erf}\left (b x\right ) e^{\left (b^{2} x^{2} + c\right )}}{x^{4}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [F] time = 0.23, size = 0, normalized size = 0.00 \[ \int \frac {{\mathrm e}^{b^{2} x^{2}+c} \erf \left (b x \right )}{x^{4}}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {\operatorname {erf}\left (b x\right ) e^{\left (b^{2} x^{2} + c\right )}}{x^{4}}\,{d x} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [F] time = 0.00, size = -1, normalized size = -0.01 \[ \int \frac {{\mathrm {e}}^{b^2\,x^2+c}\,\mathrm {erf}\left (b\,x\right )}{x^4} \,d x \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F(-1)] time = 0.00, size = 0, normalized size = 0.00 \[ \text {Timed out} \]
Verification of antiderivative is not currently implemented for this CAS.
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