$\left(5x^2+2x\right)\left(5x^2+2x\right)$
$-\sin\left(x^2\right)-\sin\left(x\right)$
$4n-7m-4n+8m$
$11\left(x-2\right)$
$\lim_{x\to0}\left(\frac{\sqrt{x^2+y^2+1}-1}{x^2+y^2}\right)$
$2y+4x+2-\left(y+1\right)$
$-16x^3+25x$
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