$2an^4-16an^2+32a$
$\int\frac{\sqrt{64-x^2}}{x^2}dx$
$4sen^2\left(x\right)\cdot tan\left(x\right)-tan\left(x\right)=0$
$\left(2+x^{\frac{3}{2}}\right)\left(2-x^{\frac{3}{2}}\right)$
$\left(w-5\right)^2$
$3cot^2x=9$
$e^{-8.5}=x$
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