$\lim_{n\to\infty}\:1+\left(-21\right)^{2n}$

$12-\left(-9\right)+\left(-3\right)\cdot2-5+\left(7-12\right)$

$\left(160\cdot243\right)\:\frac{1}{5}$

$\int\left(8x-12\right)\left(4x^2-12x\right)dx$

$\int\frac{\left(5x^3-4x^2+3\right)}{\left(x^2-x\right)}dx$

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

$3-2\:x\:5\:+7\:x\:4$