$14\cdot\left(-7+3\right)$
$x^2\left(a-2\right)+y^2\left(a-2\right)$
$\lim_{x\to4}\left(\frac{x^2}{x^2+2x-24}\right)$
$2sin^2\:q\:+\:sin\:q\:-\:1\:=\:0$
$\int\frac{5x-3}{12x^2-8x-15}dx$
$\frac{3}{8}x\frac{2}{3}$
$4x^2+12x+28$
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