$\lim_{x\to2}\left(\frac{x^3+3x^2-2}{x^2-4}\right)$
$16y^2-160y=0$
$\int\sin^3x\cdot\cos x\:dx$
$\left(\frac{3x^2}{4y^3}\right)^4$
$5.23\cdot4.5$
$\int\frac{e^{3x}}{1+e^{3x}}\:dx$
$25a^2^2-30a^2b+9b^2$
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