$x+19=40$
$-2w^3\left(-4w^6\right)$
$3x+5\ge4x-1$
$\int\frac{3x+2}{\sqrt{7x+3}}dx$
$x^3\ge16$
$\lim_{x\to0}\left(-\frac{1^x}{x^2-x}\right)$
$\frac{dz}{dt}=4+z^2$
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