V.- División de fracciones

607.608.
\large \frac{3x}{4y}:\frac{2c}{5y^{2}}\large 5ab:\frac{5a^{2}b}{2c}
609.610.
\large \frac{2xy^{2}}{7ab}:4x^{2}y^{2}\large \frac{3x^{2}y^{2}}{5ab^{2}}:\frac{6x^{2}y}{15a^{2}b^{2}}
611.612.
\large \frac{a}{b-c}:\frac{a}{b}\large (a+b):\frac{a+b}{a-b}
613.614.
\large \frac{x+y}{a-y}:(x+y)\large \frac{a+b}{a-b}:\frac{a^{2}-b^{2}}{a+b}
615.
\large \frac{1}{a+b}:\frac{1}{a^{2}-b^{2}}
616.
\large \frac{3a}{a+b}:\frac{2a}{a^{2}+2ab+b^{2}}
617.
\large \frac{x^{3}-x}{3x-6}:\frac{5x+5}{2x-4}
618.
\large \frac{5m^{2}c^{2}-20n^{2}d^{2}}{mc+2nd}:\frac{x^{2}-y^{2}}{x-y}
619.
\large \frac{12a^{2}x^{2}-3b^{3}y^{2}}{8ax+4by}:\frac{x^{2}-y^{2}}{x+y}
620.
\large \frac{x^{2}y^{2}-2xyz+z^{2}}{xy-z}:\frac{x^{2}y^{2}-z^{2}}{xy+z}
621.
\large (x^{2}-y^{2}):(\frac{1}{x}+\frac{1}{y})
622.
\large (a+\frac{c}{d}):(b+\frac{m}{n})
623.
\large (a-\frac{a^{2}}{a-b}):(b-\frac{b^{2}}{a+b})
624.
\large (x-\frac{x-y}{1+xy}):(1+\frac{x(x-y)}{1+xy})
625.
\large \frac{x^{4}-y^{4}}{x^{3}-y^{3}}:\frac{x^{2}+y^{2}}{x^{2}+xy+y^{2}}
626.
\large (1+\frac{x-a}{x+a}):(\frac{x+a}{a-a}-1)
627.
\large \frac{\frac{a}{b}-\frac{b}{a}}{\frac{a}{b^{2}}-\frac{b}{a^{2}}}:\frac{\frac{1}{a}+\frac{1}{b}}{\frac{a+b}{2a}+\frac{a-b}{2b}}

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