$5x^2y+20xy$
$\csc^2\left(t\right)-cot\:\left(t\right)$
$4x^2-x+4\:\cdot\:2x^2$
$92^{2}-552-56$
$2x-7\le\:12x-5$
$2x\:over\:9\:=\:16$
$\left(xy-12\right)\left(xy-19\right)$
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