$\int_0^{2\pi}sen^9xdx$
$\frac{dy}{dx}\left(x^2+y^2-2y+2x=47\right)$
$\lim_{x\to-4}\:\left(2x^2+5x\right)\left(x+5\right)$
$2x^2-3x-43$
$\int u^2\sin2udu$
$-2x^3\left(3x^3\right)^2$
$\lim_{x\to2}\left(\frac{\cos\left(x\right)-\cos\left(2x\right)}{x^3}\right)$
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