$\frac{d}{dx}\frac{x}{3}$

$\int tan6\left(x\right)dx$

$3a-6b+3-7a+10$

$\lim_{x\to\infty}\left(\frac{\ln\left(x\right)^2}{\sqrt{x}}\right)$

$\int\frac{1}{x^{2}\sqrt{x^{2}-1}}dx$

$\int\frac{\left(x^2-3\right)\left(x^2+5\right)}{\sqrt[3]{x^2}}dx$

$\lim_{x\to\infty}\left(\frac{e^x}{e^x+6}\right)$