$\frac{3x-10}{x-2}\le1$
$\left(9xy-2x\right)^2$
$\lim_{x\to0}\left(\frac{6}{x^2}\right)$
$t^2\frac{dy}{dx}\:-\:t^2x^2\:=\:7t^3x^2\:-\:18t^7x^2\:+\:7x$
$-78\ge-8+5m$
$2.8x+8.7=1.5x+16.5$
$z^4-45z^2+100$
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