$-9x^2\sin\left(3y\right)+20x\sin\left(3y\right)$
$\int_0^{\ln\left(2\right)}e^{x+y}dy$
$-48x+27x^3$
$10\frac{dy}{dx}-4y$
$\left(x^2+5x-14\right)-\left(x-2\right)$
$\frac{dy}{\:dx}=\left(\frac{2y+3}{4x+9}\right)^2$
$y'=\:cos2\:x\:cos\:y$
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