$\left(a-1\right)\left(a^2+3a+2\right)$
$\frac{csc\left(x\right)}{2cos\left(x\right)}$
$\left(2a-9b\right)^3$
$\frac{dx}{dt}+\:4x\:=\:e^{-4t}$
$30x^{3}-11x^{4}+12x^{3}+52x^{2}+x-12$
$4x^2+9y^2=25$
$14=x^2-4x$
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