Optimal. Leaf size=55 \[ -\frac {\sin ^{-1}(a x)}{a^3}-\frac {\sqrt {1-a^2 x^2}}{a^3 (a x+1)}-\frac {\sqrt {1-a^2 x^2}}{a^3} \]
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Rubi [A] time = 0.09, antiderivative size = 55, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, integrand size = 25, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.160, Rules used = {1639, 12, 793, 216} \[ -\frac {\sqrt {1-a^2 x^2}}{a^3 (a x+1)}-\frac {\sqrt {1-a^2 x^2}}{a^3}-\frac {\sin ^{-1}(a x)}{a^3} \]
Antiderivative was successfully verified.
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Rule 12
Rule 216
Rule 793
Rule 1639
Rubi steps
\begin {align*} \int \frac {x^2}{(1+a x) \sqrt {1-a^2 x^2}} \, dx &=-\frac {\sqrt {1-a^2 x^2}}{a^3}-\frac {\int \frac {a^3 x}{(1+a x) \sqrt {1-a^2 x^2}} \, dx}{a^4}\\ &=-\frac {\sqrt {1-a^2 x^2}}{a^3}-\frac {\int \frac {x}{(1+a x) \sqrt {1-a^2 x^2}} \, dx}{a}\\ &=-\frac {\sqrt {1-a^2 x^2}}{a^3}-\frac {\sqrt {1-a^2 x^2}}{a^3 (1+a x)}-\frac {\int \frac {1}{\sqrt {1-a^2 x^2}} \, dx}{a^2}\\ &=-\frac {\sqrt {1-a^2 x^2}}{a^3}-\frac {\sqrt {1-a^2 x^2}}{a^3 (1+a x)}-\frac {\sin ^{-1}(a x)}{a^3}\\ \end {align*}
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Mathematica [A] time = 0.05, size = 37, normalized size = 0.67 \[ -\frac {\frac {\sqrt {1-a^2 x^2} (a x+2)}{a x+1}+\sin ^{-1}(a x)}{a^3} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.87, size = 66, normalized size = 1.20 \[ -\frac {2 \, a x - 2 \, {\left (a x + 1\right )} \arctan \left (\frac {\sqrt {-a^{2} x^{2} + 1} - 1}{a x}\right ) + \sqrt {-a^{2} x^{2} + 1} {\left (a x + 2\right )} + 2}{a^{4} x + a^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.20, size = 70, normalized size = 1.27 \[ -\frac {\arcsin \left (a x\right ) \mathrm {sgn}\relax (a)}{a^{2} {\left | a \right |}} - \frac {\sqrt {-a^{2} x^{2} + 1}}{a^{3}} + \frac {2}{a^{2} {\left (\frac {\sqrt {-a^{2} x^{2} + 1} {\left | a \right |} + a}{a^{2} x} + 1\right )} {\left | a \right |}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.01, size = 84, normalized size = 1.53 \[ -\frac {\arctan \left (\frac {\sqrt {a^{2}}\, x}{\sqrt {-a^{2} x^{2}+1}}\right )}{\sqrt {a^{2}}\, a^{2}}-\frac {\sqrt {-a^{2} x^{2}+1}}{a^{3}}-\frac {\sqrt {-\left (x +\frac {1}{a}\right )^{2} a^{2}+2 \left (x +\frac {1}{a}\right ) a}}{\left (x +\frac {1}{a}\right ) a^{4}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 0.98, size = 52, normalized size = 0.95 \[ -\frac {\sqrt {-a^{2} x^{2} + 1}}{a^{4} x + a^{3}} - \frac {\arcsin \left (a x\right )}{a^{3}} - \frac {\sqrt {-a^{2} x^{2} + 1}}{a^{3}} \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.07, size = 84, normalized size = 1.53 \[ \frac {\sqrt {1-a^2\,x^2}}{\left (a\,\sqrt {-a^2}+a^2\,x\,\sqrt {-a^2}\right )\,\sqrt {-a^2}}-\frac {\mathrm {asinh}\left (x\,\sqrt {-a^2}\right )}{a^2\,\sqrt {-a^2}}-\frac {\sqrt {1-a^2\,x^2}}{a^3} \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [F] time = 0.00, size = 0, normalized size = 0.00 \[ \int \frac {x^{2}}{\sqrt {- \left (a x - 1\right ) \left (a x + 1\right )} \left (a x + 1\right )}\, dx \]
Verification of antiderivative is not currently implemented for this CAS.
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