$5\left(3w+12\right)-12$
$sin\:^2.\:cos\:w$
$\lim_{x\to\infty}\left(\frac{2x^2+7x-5}{2x^2-3x+1}\right)$
$-5x^2+2x-7=0$
$2x^2+10x-828=0$
$\frac{-2x^3+11x^2-20\:}{x^2+x-2}$
$\:7a\:and\:-3a\:$
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