$x^2-27x+50$

$\frac{1}{2}ca^2b-6a^3b+4a^3b$

$\lim_{x\to0}\left(\frac{\sin\left(3x\right)\left(e^x+5\right)}{x}\right)$

$\int\frac{2x-5}{8x-3x^2}dx$

$\lim_{x\to\infty}\ln\left(x-1\right)-\ln\left(x+1\right)$

$\frac { 1 } { 2 } z - 12 = 36$

$-\left(-8\right)^2+4\left(-8\right)+5$