$\frac{2xy}{-4x^3y^2}$
$3p+9-10-4p$
$\sqrt[5]{128f^{12}d^{14}v^{15}}$
$2x-22y-140$
$-2x+3<x-4$
$\frac{2}{9}-\frac{7}{9}+\frac{14}{9}$
$\lim_{x\to\infty}\:4x\left(\sqrt{x}-\sqrt{x-1}\right)$
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