$\lim_{x\to-2}\left(\frac{|x+2|.}{x^2-4}\right)$

$\int\left(\frac{1}{\left(21-0.75\cdot q\right)\cdot\left(15-0.25\cdot q\right)}\right)dq$

$3x^2+2y^3=19$

$\ln x^{\sin\left(x\right)}$

$x^2-2x-8\cdot x-2$

$\left(a^2b-3c^2-5d^2\right)^2$