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1.6E: Expresiones racionales (Ejercicios)
https://espanol.libretexts.org/Matematicas/Algebra/Libro%3A_Algebra_y_Trigonometria_(OpenStax)/01%3A_Prerrequisitos/1.06%3A_Expresiones_racionales/1.6E%3A_Expresiones_racionales_(Ejercicios)
63. $\frac{2 a^{2}-a-3}{2 a^{2}-6 a-8} \cdot \frac{5 a^{2}-19 a-4}{10 a^{2}-13 a-3}$ 64. $\frac{d-4}{d^{2}-9} \cdot \frac{d-3}{d^{2}-16}$ 65. \(\frac{m^{2}+5 m+6}{2 m^{2}-5 m-3} \div \frac{2 m^{2}...63. $\frac{2 a^{2}-a-3}{2 a^{2}-6 a-8} \cdot \frac{5 a^{2}-19 a-4}{10 a^{2}-13 a-3}$ 64. $\frac{d-4}{d^{2}-9} \cdot \frac{d-3}{d^{2}-16}$ 65. $\frac{m^{2}+5 m+6}{2 m^{2}-5 m-3} \div \frac{2 m^{2}+3 m-9}{4 m^{2}-4 m-3}$ 66. $\frac{4 d^{2}-7 d-2}{6 d^{2}-17 d+10} \div \frac{8 d^{2}+6 d+1}{6 d^{2}+7 d-10}$ 68. $\frac{12}{a^{2}+2 a+1}-\frac{3}{a^{2}-1}$ 69. $\frac{\frac{1}{d}+\frac{2}{c}}{\frac{6 c+12 d}{d c}}$ 70. $\frac{\frac{3}{x}-\frac{7}{y}}{\frac{2}{x}}$

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