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

$1,\frac{4\sqrt{2}+\sqrt{7}}{\sqrt{2}}$

$4x-6y-8y+3xy-9x-4y+3xy-2y+8xy-8x-5y+4x$

$\int\left(\left(2x-8\right)\cdot\left(x^2-8x+2\right)^7\right)\:dx$

$7\cdot2-4\cdot4$

$\frac{\left|-20\right|}{\left(-10\right)}$

$n+12=25$