$\left(\frac{2}{3}x^3-\frac{1}{2}y\right)^2$
$\int\:8xcos4x^2dx$
$\int-3\frac{csc^4x}{cot^2x}dx$
$x^2-3x-70=0$
$\frac{x}{5}+\frac{x}{2}+\frac{x}{4}<19$
$\frac{10}{2}+20+3$
$\left(x^{a-1}-8\right)\left(x^{a+1}+9\right)$
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