$8x-10x+x$
$\frac{-4}{x+5}\ge1$
$x^2+10x-25=0$
$-5y^2+y^2$
$4x^2+5x+3=0$
$3\left(2b-a\right)-9a\:+6b$
$\frac{x^3-20}{x-3}$
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