$\frac{d}{dx}\left(\frac{\left(2x^3+1\right)e^{x^8}}{x^2}\right)$
$-x+2=5$
$\left(-5\right)^6\cdot\left(-7\right)^6$
$-63=-9z$
$\frac{\frac{3}{4}b^3}{\frac{2}{3}c^2}$
$cos\left(x\right)+cos\left(2x\right)+cos\left(3x\right)=cos\left(2x\right)\left(1+2cos\left(x\right)\right)$
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