\(a,\dfrac{1}{6x^3y^2}=\dfrac{6y^2}{36x^3y^4};\dfrac{x+1}{9x^2y^2}=\dfrac{4xy^2\left(x+1\right)}{36x^3y^4};\dfrac{x-1}{4xy^3}=\dfrac{9x^2y\left(x-1\right)}{36x^3y^4}\\ b,\dfrac{3+2x}{10x^4y}=\dfrac{12y^2\left(2x+3\right)}{120x^4y^3};\dfrac{5}{8x^2y^2}=\dfrac{75x^2y}{120x^4y^3};\dfrac{2}{3xy^3}=\dfrac{80x^3}{120x^4y^3}\\ c,\dfrac{4x-4}{2x\left(x+3\right)}=\dfrac{3\left(4x-4\right)\left(x+1\right)}{6x\left(x+3\right)\left(x+1\right)};\dfrac{x-3}{3x\left(x+1\right)}=\dfrac{2\left(x-3\right)\left(x+3\right)}{6x\left(x+1\right)\left(x+3\right)}\)
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