$\int_1^3\left(4v\left(4u^2+1\right)^{\frac{1}{2}}\right)du$
$\int\frac{x^3-5x}{x^2+4x+3}dx$
$2\sin2x+\cos x=0$
$\left(x^3-9\right)\left(x^3-2\right)$
$x^2+7+1$
$\int x\left(7x+5\right)^{\frac{3}{2}}dx$
$1-2\ln\left(x\right)=4$
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