$a^2-10a-25$
$-4\cdot6-21$
$100a^8-100a^2+ab^2$
$\left(3a^2b^0\right)\left(21^0ab^3\right)\left(12^{-1}a^{-4}\right)$
$\:\frac{24x^{20}y^9}{6x^{17}y^6}$
$x+22<102-9x$
$\int\cot^4y\:dy$
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