$\left(m^3:m\right)m^2$

$\lim_{x\to0}\left(\frac{\sin\left(x\right)}{4x}\right)^{\frac{1}{\pi}}$

$16x^2-72x+81$

$\int\frac{cosx}{sen^2x}cosxdx$

$\left(x^2+1\right)y'+\left(4xy\right)=x$

$\left(2ab-b^2\right)$

$\lim_{x\to0}\left(\frac{1+\cos\left(x\right)}{x^2}\right)$