a: \(\dfrac{4x^5-8x^3}{-2x^3}=-2x^5+4\)
b: \(\dfrac{9x^3-12x^2+3x}{-3x}=-3x^2+4x-1\)
c: \(\dfrac{xy^2+4x^2y^3-3x^3y^4}{-2xy^2}=-\dfrac{1}{2}-2xy+\dfrac{3}{2}x^2y^2\)
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