$f\left(x\right)\:=\:x\:^3-6x\:\left[-1,1\right]$

$\int e^{7x}\left(\frac{e^{2x}}{9}+\frac{3}{e^{8x}}\right)dx$

$\lim_{x\to0}\left(1+6x\right)^{\frac{5}{x}}$

$\left(\frac{3}{4}x+\frac{1}{2}y^2\right)^2$

$2x+3\ge1$

$2\cos^2\left(y\right)=1$