$2\cdot7+9$

$64-16m+m^2$

$\left(10\right)^5+\left(10\right)^4+\left(10\right)^3+\left(10\right)^2+\left(10\right)+\left(1\right)$

$\int e^x\left(e^x+1\right)\left(e^x-1\right)dx$

$\lim_{x\to0}\left(\frac{\left(x^2-2x\right)}{\left(x-\sqrt{x}\right)}\right)$

$xe^{-y}sen\:x\:dx=ydy$

$\csc^2\left(t\right)-cot\:\left(t\right)$