Integrand size = 39, antiderivative size = 112 \[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=\frac {4 \sqrt {b^2+a^2 x^2} \left (-b^2 x+a^2 x^3\right )}{3 \left (a x+\sqrt {b^2+a^2 x^2}\right )^{5/2}}+\frac {2 \left (-7 b^4-5 a^2 b^2 x^2+10 a^4 x^4\right )}{15 a \left (a x+\sqrt {b^2+a^2 x^2}\right )^{5/2}} \]
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Time = 0.08 (sec) , antiderivative size = 95, normalized size of antiderivative = 0.85, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.051, Rules used = {2147, 276} \[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=-\frac {b^2}{a \sqrt {\sqrt {a^2 x^2+b^2}+a x}}+\frac {\left (\sqrt {a^2 x^2+b^2}+a x\right )^{3/2}}{6 a}-\frac {b^4}{10 a \left (\sqrt {a^2 x^2+b^2}+a x\right )^{5/2}} \]
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Rule 276
Rule 2147
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {\left (b^2+x^2\right )^2}{x^{7/2}} \, dx,x,a x+\sqrt {b^2+a^2 x^2}\right )}{4 a} \\ & = \frac {\text {Subst}\left (\int \left (\frac {b^4}{x^{7/2}}+\frac {2 b^2}{x^{3/2}}+\sqrt {x}\right ) \, dx,x,a x+\sqrt {b^2+a^2 x^2}\right )}{4 a} \\ & = -\frac {b^4}{10 a \left (a x+\sqrt {b^2+a^2 x^2}\right )^{5/2}}-\frac {b^2}{a \sqrt {a x+\sqrt {b^2+a^2 x^2}}}+\frac {\left (a x+\sqrt {b^2+a^2 x^2}\right )^{3/2}}{6 a} \\ \end{align*}
Time = 0.13 (sec) , antiderivative size = 91, normalized size of antiderivative = 0.81 \[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=-\frac {2 \left (7 b^4-10 a^3 x^3 \left (a x+\sqrt {b^2+a^2 x^2}\right )+5 a b^2 x \left (a x+2 \sqrt {b^2+a^2 x^2}\right )\right )}{15 a \left (a x+\sqrt {b^2+a^2 x^2}\right )^{5/2}} \]
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\[\int \frac {\sqrt {a^{2} x^{2}+b^{2}}}{\sqrt {a x +\sqrt {a^{2} x^{2}+b^{2}}}}d x\]
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none
Time = 0.26 (sec) , antiderivative size = 72, normalized size of antiderivative = 0.64 \[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=\frac {2 \, {\left (3 \, a^{3} x^{3} + 11 \, a b^{2} x - {\left (3 \, a^{2} x^{2} + 7 \, b^{2}\right )} \sqrt {a^{2} x^{2} + b^{2}}\right )} \sqrt {a x + \sqrt {a^{2} x^{2} + b^{2}}}}{15 \, a b^{2}} \]
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\[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=\int \frac {\sqrt {a^{2} x^{2} + b^{2}}}{\sqrt {a x + \sqrt {a^{2} x^{2} + b^{2}}}}\, dx \]
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\[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=\int { \frac {\sqrt {a^{2} x^{2} + b^{2}}}{\sqrt {a x + \sqrt {a^{2} x^{2} + b^{2}}}} \,d x } \]
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\[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=\int { \frac {\sqrt {a^{2} x^{2} + b^{2}}}{\sqrt {a x + \sqrt {a^{2} x^{2} + b^{2}}}} \,d x } \]
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Timed out. \[ \int \frac {\sqrt {b^2+a^2 x^2}}{\sqrt {a x+\sqrt {b^2+a^2 x^2}}} \, dx=\int \frac {\sqrt {a^2\,x^2+b^2}}{\sqrt {a\,x+\sqrt {a^2\,x^2+b^2}}} \,d x \]
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