$\frac{x}{x-1}-\frac{3}{1-x}=2$
$w^4.w^2.w$
$\frac{dy}{dx}=6xy^2+y$
$2x+12+8x+6+5x$
$7+2b+7b+2$
$\frac{2y^4}{y^3-y^2+y-1}$
$\left(3x^2\right)\left(-5x^3y^2\right)$
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