b. \( \quad \) Simplify \( (\sqrt{5})^{-2} \times 75^{1 / 2} \times 12^{-1 / 2} \)

\( \left.<x<\frac{5}{13}\right) \quad \begin{array}{ll}\text { a) }\left(-3 \frac{5}{8}+7,6\right)-\left(10,8-8 \frac{3}{4}\right) ; & \text { b) }-\left(5 \frac{4}{9}-6 \frac{5}{12}\right)+\left(-3 \frac{2}{3}-\frac{5}{9}\right)\end{array} \)

18. Find \( g \circ f \) of the functions. \[ f(x)=\sqrt{x+5} \quad g(x)=\frac{1}{x-6} \]

i se considera que \( \sqrt[4]{4}=1,41 \), ¿cuál es el valor de \( \sqrt[4]{64} \) ?

AUTOEVALUACION Opera. \[ (-3)^{-2}+\left(\frac{3}{4}\right)^{-1}-2^{-3}\left(1-\frac{1}{2}\right)^{-2} \]

Use the properties of logarithms to expand the expression. \( \ln \left(5 m^{6}\right) \) \( \ln \left(5 m^{6}\right)=\square \)