$\frac{12x^3-13^2-8x+3}{4x+1}$
$\frac{4^5\cdot4^{-3}}{4^{-4}}$
$\frac{x^2}{x-3}-\frac{3x}{x-3}$
$180y+100$
$3x^2-2x-5$
$\frac{x}{2x-6}=\frac{x+8}{15}$
$w^2+2w+4w+2$
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