$\lim_{x\to0}\left(\frac{19}{t^{\frac{1}{19}}}\right)$

$\int\frac{5}{m\sqrt{16-m^2}}dm$

$12\left(\sqrt{\frac{180}{9}}\right)$

$\left(\frac{\frac{4}{x+1}-\frac{1}{2}}{x-7}\right)$

$\frac{d}{dx}e^{2xy}=3y$

$\int_{-\infty}^0\ln\left(x\right)dx$

$\int3x^3cos\:\left(x\right)dx$