$9x-1=107-3x$
$9ab^3-18a^2b$
$-\frac{e^y\sin\:\left(2e^y\right)}{2\cos\:^2\left(e^y\right)}$
$x+15<11$
$4-\left[7-\left(-2\right)\right]$
$\cot x+\tan x$
$\int\left(x\cdot\left(4-x^2\right)^3\right)dx$
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