$810+310+510-610$
$16x^2+40x+9$
$\frac{380.50}{4}$
$\frac{8^7}{8^2}$
$\:14x^2y^2-28x^3+56x\left\{4\right\}$
$\frac{x^4+x^2-2}{x^2+2}$
$\lim_{z\to+0}\left(z\cdot\ln\left(z\right)\right)$
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