$2\sin^2\left(a\right)-5\sin\left(a\right)+2$
$x^2-4x-32=0$
$\left(12x^2+11x+2\right)\left(3x+2\right)$
$4m-7m$
$9m^3-36n^8$
$\frac{1}{x^3+3x}$
$-3+7-8-4-2-4+9$
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