I.- Simplificar fracciones

500.501.
\large \frac{12a^{4}b^{2c}}{3a^{3}bc}\large \frac{10a^{2}bc}{-5ab}
502.503.
\large \frac{-15a^{2}bc^{2}d^{3}}{5abc^{2}d}\large \frac{-12a^{2}x}{-28ax^{2}}
504.505.
\large \frac{10ab^{2}x^{4}y}{15b^{3}x^{2}y^{3}z}\large \frac{-20abc^{3}}{2ab^{2}}
506.507.
\large \frac{-18a^{3}bc^{2}x}{-36a^{4}b^{2}x}\large \frac{3a^{2}b}{18a^{3}b^{2}}
508.509.
\large \frac{-12acx^{2}}{26a^{2}c^{2}x}\large \frac{38m^{3}n^{4}r^{2}}{57m^{4}n^{4}r}
510.511.
\large \frac{b+b^{2}}{a+ab}\large \frac{a^{2}-b^{2}}{a^{2}-2ab+b^{2}}
512.513.
\large \frac{x^{2}x}{xy-x}\large \frac{x^{3}-1}{x-1}
514.515.
\large \frac{x^{2}y-xy}{x^{2}-1}\large \frac{4a^{2}b^{3}-8a^{3}b^{3}}{12a^{2}b^{4}+4a^{4}b^{4}}
516.517.
\large \frac{x^{2}-9y^{2}}{ax+3ay}\large \frac{x^{3}-x}{(x-1)(x+1)^{2}}
518.
\large \frac{12x^{2}y-18xy^{2}}{10ax^{3}y^{2}-15ax^{2}y^{3}}
519.
\large \frac{5x^{3}y^{4}-10x^{2}y^{}}{7x^{4}y^{2}-14x^{3}y}
520.
\large \frac{ax^{2}-a^{3}}{bx^{2}-a^{2}b}
521.
\large \frac{35xz-45yz}{7x-9y}
522.
\large \frac{ax+by}{ax^{2}+bxy}
523.
\large \frac{2a^{2}+4ab}{3ab+6b^{2}}
524.
\large \frac{16x^{3}y-20x^{2}z}{28x^{2}y^{3}z^{2}-35xy^{2}z^{3}}
525.526.
\large \frac{(a-b)^{2}}{a^{2}-b^{2}}\large \frac{a^{3}+b^{3}}{a^{2}-b^{2}}
527.
\large \frac{x^{2}+4x+4}{x^{2}-4}
528.
\large \frac{6a^{3}-21a^{2}+15a}{2a^{2}-7a+5}
529.
\large \frac{3a^{2}-6a+3}{6ax-6x}
530.
\large \frac{a^{2}x-2ax-x}{2a^{3}-6a^{2}+6a-2}
531.
\large \frac{5a^{3}-10a^{2}b+5ab^{2}}{8a^{3}-8a^{2}b}
532.
\large \frac{7a-7b-7c}{21a-21b-21c}
533.
\large \frac{9a^{5}-4a}{6a^{2}b^{2}-4ab^{2}}
534.
\large \frac{x^{2}+4x+4}{x^{2}-4}
535.
\large \frac{a^{4}-x^{4}}{a^{3}x-ax^{3}}
536.
\large \frac{(x-y)^{2}+4xy}{3x+3y}
537.
\large \frac{xy-3x-5y+15}{xy-3x}
538.
\large \frac{xy-2y+x-2}{xy+x-5y-5}
539.
\large \frac{a^{2}-2ab+b^{2}}{a^{2}-a(b+c)+bc}
540.
\large \frac{a^{2}+b^{2}-c^{2}+2ab}{a^{2}+c^{2}-b^{2}+2ac}
541.
\large \frac{a^{2}-b^{2}-ac-bc}{a^{2}-b^{2}}
542.
\large \frac{(a+b)^{2}-(a-b)^{2}}{8abx}
543.
\large \frac{(x^{2}-4)(x^{2}-2x+1)}{x(x^{2}-1)-2(x^{2}-1)}
544.
\large \frac{(x+y)^{2}-(x-y)^{2}}{x^{2}y-xy^{2}}
545.
\large \frac{(a-1)(a+1)^{2}}{a^{3}-a}
546.
\large \frac{(a+b)^{2}-4ab}{2a-2b}
547.
\large \frac{(a+b)^{2}-4ab}{2a-2b}

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