$\left(a-2b^2\right)\left(a^3+b^2\right)$
$\left(7m^3n^2-5m^2n\right)\left(7m^3n^2+5m^2n\right)$
$-5-3n+62n+2m-8$
$\frac{a}{2}+\frac{\sin\left(\pi\cdot x\right)}{2}+\frac{b}{2}$
$\frac{dy}{dx}=5y+7$
$5sen\:x\:-4\:=\:0$
$128+453$
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