$\frac{dy}{dx}=3\left(x+1\right)^2.y$
$\int\left(8x-1\right)e^xdx$
$4cos^2\left(\frac{3\pi}{4}\right)-3sin^2\left(\frac{3\pi\:}{4}\right)$
$\frac{4^8}{4^{-4}}$
$\left(7+a\right)^2$
$\:r+3-6r+\:r$
$-2sin\left(2x\right)sin\left(x\right)$
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