$x^3+3x^2-x-3$
$3xy^2-2xy+y,\:x=1,\:y=-1$
$-8\:+\:r\:=\:-12$
$5w+z+w+3z+w+1$
$\int\frac{-2x^4-2}{x^2\left(x^2-1\right)}dx$
$4x+5y=14$
$\left(4y-3\right)\left(y+5\right)$
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