$\left(\frac{a}{2}\right)+10=19$

$\ln x+\ln\left(x+1\right)=\left(\ln\left(30\right)\right)$

$\int x+\left(x+2\right)^{\frac{1}{2}}\:dx$

$\left(2x-4\right)\left(x+8\right)$

$-4x^2-16<0$

$\frac{-12a^3b^4}{6a^3b^4}$

$\lim_{x\to\infty}\left(\frac{x^2+x-12}{x-1}\right)$