$\frac{2}{5}\left(y-10\right)$
$-9-\left(-10+\left(15-25\right)\right)$
$\lim_{x\to3}\left(\frac{2x^2-7x+3}{x^3+3x^2-x+3}\right)$
$[x-5]<x+2$
$3\cdot5+\frac{400}{20}+\left(87-72\right)$
$\left(xy-4\right)^2\cdot\left(xy-4\right)$
$5m-3m^{2}+2m-3+m$
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