$\frac{d}{dt}\left(\left(s\cdot cos\left(t\right)\right)^2\cdot\left(s\cdot sin\left(t\right)\right)^3\right)$
$-4-\left(+24\right)\left(+1-9\right)-\left(-1-2\right)$
$\int_0^2\left(\sqrt{x^2-4}\right)dx$
$\left(y^3-2\right)^2$
$-3^4.+3^2$
$\int\frac{2}{\sqrt{3+2x}}dx$
$y''-4y'+y=0$
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