$\left(mn-4\right)\left(m^2n^2+4mn+16\right)$

$\lim_{x\to-2}\left(\frac{x^3+3x^2+3x}{x+2}\right)$

$\int\frac{9x-8}{\left(x-3\right)\left(2x+5\right)}dx$

$1^3-3\left(1\right)^2+3\left(1\right)-1$

$350-\left(7-2+5\right)-\left(6+3\right)+\left(9+8-2\right)$

$\int_4^9\frac{\left(1-\sqrt{x}\right)}{\left(1+\sqrt{x}\right)}dx$

$x^2-sen\left(x+y\right)=1$