$\int\frac{1}{\sqrt{4x^2+16x-20}}dx$
$4-18+5-32$
$\tan\left(30\right)^2+\cot\left(30\right)^2$
$-40+15+10-80$
$\frac{5+2\tan\left(x\right)}{3+2\tan\left(x\right)}=1+\tan\left(x\right)$
$\left(x+2\right)\left(x^2-4x-1\right)$
$\left(10x^3-9y^5\right)^2$
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