$\frac{32x^2-2}{4x+1}$
$-45-39$
$\int\left(\frac{25-24x^2}{x^4+25x^2}\right)dx$
$x^2+y^2-x-2y-\frac{11}{4}=0$
$-30-47,3$
$\int8^{-4x}dx$
$\left(2x-5y^3+7\right)^2$
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