$\:-\:4x\:-\:\left[-\:2x\:+\:\left(\:5y\:-\:6x\:+\:2y\:\right)\:\right]\:$
$\lim_{x\to4}\left(\frac{x^2+7x+12}{x^2-x-20}\right)$
$-11000-8848$
$4x^2\left(2x-5\right)+8x^2\left(2x-5\right)$
$\int q^4ln\left(10q\right)dq$
$\int\frac{-2x-3}{\left(x^2+1\right)\left(x-1\right)^2}dx$
$\left(4a^3-3b^{44}\right)^3$
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