$-a+b+2b-2a+3a+2a-3b$
$\frac{4x-2}{5}+\frac{x+1}{2}>4$
$\left(4x+6\right)\left(2x-3\right)$
$\int_0^{\infty}\left(e^{-st}cos\left(wt\right)\right)dx$
$1\:<\frac{3}{x}$
$6x^2+4x=0$
$\lim_{x\to0}\left(\frac{3x^2}{cos\:x-1}\right)$
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