$\frac{4x^2-8x-5}{4x-4}\cdot\frac{x-1}{4x^2-25}$
$14^2$
$\frac{-40xy^2}{-2^3xy}$
$\frac{x^{3\:}+4}{x^2+4}$
$\left(x+ax\right)\left(x+ax\right)\left(x+ax\right)$
$2x^2+9x-18$
$y\:+\:50\:-\:15$
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