$4n^2-32n=-4n^2-14$
$\int\left(\frac{7x^2}{\left(81+x^2\right)^2}\right)dx$
$\lim_{x\to\infty}\left(\frac{6x^2-x^4}{9}\right)$
$\int\left(x^2+x\right).e^xdx$
$-2\left(7g\:+\:6\right)\:$
$\frac{4x^2-4x^2+x-6}{2x^2-1}$
$\left(3m^3+2n^2\right)\left(3m^3-3n^2\right)$
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