$\left(5v+3\right)-\left(4w+5v-7\right)+\left(6w-20\right)$

$\int\frac{x^2+2x-6}{\left(x-1\right)^3}dx$

$\lim_{x\to\infty}\left(sqrt\left(\frac{1+4x^2}{1+x^2}\right)\right)$

$\lim_{x\to-\infty}\left(\sqrt{x^2+x}-\sqrt{x^2-x}\right)$

$vector\:0.5d\:+\:1.2c\:$

$5x-7x+7x-8x+9x-x$

$\int\sqrt{x^2\left(x^2-81\right)^3}dx$