$\frac{-5x^4}{-5^4}$
$436.78\cdot10$
$\frac{d}{dx}x^2+4y$
$\lim_{x\to3}\:\frac{\left(x-3\right)}{x^3-2}$
$\frac{\left(m^{-1}+n^{-1}\right)}{\left(m^{-1}-n^{-1}\right)}$
$\int\frac{4}{sqrt\left(81-x^2\right)}dx$
$\frac{1}{\sec^2a\cdot\left(1-\sin^2a\right)}$
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