$2a-3b;a=-1,b=-1$
$3x+5\ge2x-3$
$\frac{5x^3+6x^4-1}{x+3x^2-2}$
$-\left(-2-\left(-1-1+2\right)\right)$
$\int_2^xdx$
$s^2+4s+5$
$\lim_{x\to0}\left(\frac{\left(e^x-1\right)}{x\left(1+x\right)}\right)$
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