$-62\ge31u$
$m^2\cdot3a^2+2\cdot3a\cdot2+2^2$
$2x\:+\:5x\:+\:30$
$\frac{x-2}{x^2-4}+\frac{1}{x-2}=\frac{1}{x-2}$
$\left(-\:2xy^2z^2\right)\left(-\:x^2y^3z\right)$
$10y^2-4x^2$
$\int e^{7x}dx$
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