$\left(0.4\sin\left(2\right)\right)$
$\frac{d}{dx}x^{cos\left(7x\right)}$
$\frac{x^{2n}-y^{2n}}{x^n-y^n}$
$y=\frac{2}{3}x+7$
$49r^2+14r+4$
$\sin\left(-x\right)$
$4m\left(4m+2n\right)+2n\left(4m+2n\right)$
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