$( 22 x ^ { 4 } + 15 x ^ { 3 } + c x )$
$\frac{2x}{x+1}+\frac{1}{x-1}$
$sen\:\left(x+b\right)$
$\frac{m^8-256}{m+2}$
$-12x^3\left(3x^2\right)\left(-2x^{-3}\right)\left(\frac{1}{2}x^{-1}y\right)$
$4y^2\:=0$
$\frac{\left(4y\right)^4}{4y^2}$
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