$\int\left(2x\left(x^2+1\right)^{-5}\right)dx$

$\left(\frac{1}{4}\right)^5\cdot4^{13}$

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

$2x^2+12x-5=0$

$x^2y^2+x^4y^2+x^3y^2+x^2y^3$

$\lim_{x\to5}\left(\frac{7-x+\sqrt{x-1}}{25-x^2}\right)$

$\lim_{x\to\frac{5}{2}}\left(5-2x\right)\tan\left(\frac{\pi x}{5}\right)$