$2\cot\left(x\right)+2$
$\frac{x^2}{25}+\frac{y^2}{9}=1$
$\frac{dx}{dy}=\frac{1}{x^{\ln2e}}$
$5+8w+2w-4-6w$
$\lim_{x\to0}\left(2^x-x^{10}\right)$
$\frac{2}{2^{\frac{1}{2}}a^1\:}\cdot\:\frac{4}{2^3\left(\frac{1}{2a^2}\right)^{\frac{3}{2}}}$
$sec^2x-\frac{tanx}{cosx}=\frac{1}{1+sinx}$
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