$\frac{x}{2}>1-\frac{x}{4}$
$-10\:\left(\frac{9}{5}\right)\left(\frac{-10}{5}\right)\left(\frac{-30}{-1}\right)$
$\int3xcos2x.dx$
$\frac{d^{20}}{dx^{20}}\left(x^{-4}\right)$
$20+90+51fgmn$
$126.9-53$
$-2sin\left(2x\right)sin\left(x\right)$
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