$x^4-2x^2$
$\int\frac{1}{\sqrt{5t+6}}dt$
$\lim_{x\to0}\left(\frac{e^x-e^{-x}-2senx}{xsenx}\right)$
$\int\left(x\sqrt{4x^2+549}\right)dx$
$2x^2-12x-3=0$
$\frac{dy}{dt}=30y$
$\sqrt[3]{\frac{8a^5}{2}}+\sqrt[3]{\frac{a^2}{4}}$
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