$\sin\left(4x\right)=2\sin x\left(\left(cos3x\right)\right)+\sin\left(2x\right)$
$y\frac{dy}{dx}=2x^3$
$\sec^230-\tan^245$
$\int100x^3cos\left(5x^4+3\right)dx$
$\frac{x^3+3x-2}{x+2}$
$\frac{-3x^3+9x^2+2x-4}{x-3}$
$64+5.72+13.9$
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