$\lim_{x\to0}\left(\frac{8x^2-1}{x\cdot\ln\left(x\right)}\right)$

$\left(m-5u\right)\left(m+5u\right)$

$\int\:\frac{ln\:^2x}{x}dx$

$\left(\sqrt{x-1}\right)\left(x^2+4\right)$

$\frac{d^2}{dx^2}\left(exp\left(-t^2\right)\right)$

$\int\left(\left(3x^2-4x\right)e^{2x}\right)dx$

$+7y\:+\:y\:+4y$