$\lim_{x\to1}\left(\frac{x^3-x}{\left(x^2-1\right)}\right)$

$-7\left(16\right)+64$

$a^2-6a-91=0$

$\lim_{x\to\infty}\left(\left(\frac{x^2}{e^x}\right)\right)$

$\int\frac{2x^2+25}{\left(x^2+9\right)\left(x^2+16\right)}dx$

$\left(17x^3+103x\right)$

$\left(x^{a-1}+y^{b-2}\right)^2$