$e^{9z}=xyz$
$\sec\left(45\right)=\frac{1}{\cos\left(45\right)}$
$4\cdot2-5$
$\frac{d}{dx}2^x+x^2$
$5y^2-45$
$\frac{\left(6x^5-5x^3+2x^2-3x+2\right)}{\left(2x^2+1\right)}$
$\frac{d}{dx}\sqrt{13}$
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