$2\left(x+h\right)^3$

$\lim_{x\to1}\left(\cos x\right)^{\frac{1}{2}}$

$\lim_{u\to5}\:\frac{4}{u-7}$

$\lim\:_{x\to\:\:0}\left(cos\left(4x\right)\right)^{\frac{3}{x^2}}$

$\lim_{x\to5}\left(\frac{ln5x}{5}\right)$

$64-m^3$

$\frac{\left(ab^3\right)^2}{\left(a^2b^3\right)}.\frac{\left(a^2b^3\right)^2}{\left(b^3\right)^2}$