$\frac{1}{x^2-x-2}$
$6\cdot44\cdot3+4\cdot95\cdot4$
$-9v+\left(-6\right)$
$x+3.9=-7.5$
$\int x\frac{3}{5}\:dx$
$\left(m-n+t\right)^2$
$\left(-4\cdot x+2\right)^2$
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