$\int8x^3e^{3x}dx$
$4\cos\left(x\right)=-1+2\cos\left(x\right)$
$4\left(sin^4\left(x\right)+\cos^4\left(x\right)\right)$
$\int\sin\left(8x\right)\cos\left(9x\right)dx$
$\frac{dy}{dx}=2x+4y$
$\left(5x+10\right)\left(3x-10\right)$
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