$\left(3x^2\right)\left(x^{-2}\right)$
$5 \cdot ( 4 + 3 )$
$m+2\:m-1+4m$
$3=4\left(p+3\right)-5p$
$\left(x^2-1\right)\left(x^2-2\right)$
$\frac{dy}{dx}=\frac{y}{y+x}$
$6x^2-19x-7$
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