$-12\sqrt{4}$

$\lim_{x\to3}\left(\frac{x^3-32}{x-3}\right)$

$95\cdot75$

$x^3+2x^2+x-x^2-2x-1$

$\frac{0.4}{0.12}\frac{\left(1\:\right)}{0.12}$

$\left(a^{x-1}-1b^{x-1}\right)\left(a^{x-1}+2b^{x-1}\right)$

$\lim_{x\to11}\left(\frac{\left(x^2-121\right)}{\sqrt{x+5}-4}\right)$