$10+15-1-10-2+12$

$\int\frac{1}{\left(x-1\right)^2\left(x+4\right)^2}dx$

$\frac{\left(x^2-16\right)}{\left(x^2+2x-24\right)}$

$f\left(x\right)=\left(2x^3-2\right)\left(3x^4+5x^2\right)$

$13^7\cdot13^{-5}$

$\lim_{x\to\infty}\left(\left(\frac{11x}{11x+9}\right)^{3x}\right)$

$\lim_{x\to\infty}\left(\frac{\sqrt{4x^2-1}}{x+2}\right)$