$x+2\sqrt{3}<2\left(3x-4\right)$
$7a\left(x+y\right)-5b\left(x+y\right)+8c\left(x+y\right)$
$\left(m^{4+2}3m^2\right)^2$
$7\:-4\:3\:28$
$x^2-x-56<0$
$2t^2+5t-7$
$\lim_{x\to+3}\left(\frac{1}{3-x}-\frac{4x}{9-x^2}\right)$
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