$\left(3p+5q\right)\left(3p-5q\right)$
$\int x^8\left(x^9+3\right)^7\:dx$
$x-13-2x+2$
$\lim_{x\to\infty}\left(\frac{\arctan\left(x^3\right)}{x^4}\right)$
$9x^4+144$
$4x^6\:-\:x^3\:+\:\frac{25}{100}$
$\frac{dy}{dx}=4x\csc y$
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