$2^3\cdot4^2$
$-15^3$
$\sec^2\left(x\right)+\csc\left(x\right)$
$\lim_{x\to0}\left(\frac{3x^2-2x}{x}\right)$
$w^2-5w+w$
$3x^2+10x-9$
$7x=3x+24$
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