$\left(1+\cot\left(^2x\right)\right)\tan\left(x\right)$
$\left(2a-4\right)\left(5a-7\right)$
$\int\left(2-5z\right)e^{-z}\:dz$
$2x+3>5$
$2^{8^{x-2}}=4^{4^{x-1}}$
$\frac{x^3+5x^2-4x-20}{x+4}$
$4x^2+x^4-36$
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