$\int_{-1}^3\left(\frac{1}{\sqrt{1-x^2}}\right)dx$

$y=\ln\left(6x^{3}\right)$

$2a\sqrt{a}\cdot a\cdot b\sqrt[3]{b}\cdot b\sqrt[4]{a\cdot b\cdot c}$

$\frac{d}{dx}\left(ln\left(x+\sqrt{x^2+k}\right)\right)$

$dz=e^x\sin\left(y\right)$

$\lim_{x\to4}\left(\frac{4\:tan\:\left(x+5\right)}{x^2-25}\right)$

$1+\frac{\sin\left(a\right)}{\cos\left(a\right)}$