$\frac{dy}{dt}=y^2+2y$
$y^2-225$
$\frac{\tan\left(x\right)+\cot\left(y\right)}{\tan\left(x\right)\cdot\cot\left(y\right)}$
$2x^2-8>0$
$\left(8m^2-5z^4\right)^2$
$12x^2-14x=-5$
$\frac{620}{4}$
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