$k^2-5k+9$
$\left(\frac{1}{w^3}+w^2\right)^0$
$-4-15\cdot15$
$\int3sin^32xcos^32x\:dx$
$9a+7-9a+3$
$\frac{\left(2x+xy^2\right)}{\left(4y+yx^2\right)}$
$\lim_{x\to0}2\sqrt{x}ln\:t$
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