$2x^2+5x+3=0$
$x^2+4x>13$
$\lim_{x\to-1}\left(2x^2-2\right)$
$2\cdot\frac{7}{4}\cdot\frac{16}{28}\cdot9$
$\int\frac{\left(6x-2\right)}{x^2-11x+30}dx$
$4c+\left(-c\right)+4+\left(-1\right)$
$\left(1-cosx\right)\left(1+cosx\right)=\sin\:^2\left(x\right)$
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