$10^2\cdot10^4$

$\lim_{x\to\infty}\left(\frac{x\left(2x+1\right)^2}{\left(x+2\right)\left(x-2\right)\left(x+1\right)}\right)$

$\int\frac{5x}{\sqrt{x^2+1}}dx$

$cot2x=1$

$4x^2+5bx$

$\left(3y\right)\frac{dy}{dx}=w^2$

$\lim_{x\to0}\left(\frac{2sin\left(\frac{x}{2}\right)}{x}\right)^2$