$\left(a-17\right)\left(a-7\right)$
$\cos x-4=\sin x-4$
$\frac{x^3-12x^2-42}{x-2}$
$\frac{1+\sin\left(2y\right)}{\cos\left(2y\right)}$
$3x^3-2x^2+5x-3y\:4x^2-3x+2$
$\frac{b}{-16}=5$
$x^{-1}2x$
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