$\frac{z\:cos\:\left(\sqrt[3]{z^2+3}\right)}{\left(\sqrt[3]{z^2+3}\right)^2}$
$\frac{\left(-1^n\cdot x^{3n-2}\right)}{\left(n\cdot2^n\right)}$
$\frac{d}{dx}\frac{x}{y}-\frac{y}{x}=xy$
$\lim_{x\to\infty}\left(\frac{2^x+3^{x-1}}{3^x}\right)$
$-3b-10b$
$\left(-13\right)\left(5\right)\left(-3\right)$
$y'\:+y=yxe^{x+2}$
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