$12-\frac{5x}{2}\ge\frac{x}{4}+1$
$\frac{t^2-4}{t+8}$
$2.86\:=\:2.6\left(u\:+\:-2.3\right)$
$cos=0.45$
$x^2+7x-144=0$
$\left(2x-7\right)\left(3x+2\right)$
$3y+7+4y+3$
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