28+\frac{9}{-14}

\frac{11}{-60}+\frac{-1}{6}

\frac{7}{-4}+\frac{5}{-4}

\frac{11}{20}+\frac{11}{-25}

\frac{-9}{-8}+\frac{-13}{-16}

-13\cdot \frac{-13}{-19}

\frac{-10}{21}\cdot \frac{-9}{23}

\frac{\frac{2}{17}}{\frac{4}{-3}}=

\frac{\frac{16}{15}}{\frac{17}{20}}=

\frac{-15}{\frac{7}{11}}=

\frac{\frac{-12}{-5}}{-3}=

\frac {11}{19} = \frac {\editable {} }{-114}

\frac {-16}{-3} = \frac {-96}{\editable {} }

\frac {-18}{-13} = \frac {\editable {} }{-130}

\frac {51}{60} = \frac {17}{\editable {} }

Simplifica la expresion algebraica

\frac{21 x - 28 y}{-28}

Simplifica la expresion algebraica

\frac{-10 x + 15 y}{-20}

Simplifica la expresion algebraica

27 - 9 \cdot \frac{-15 - 8 x}{9}

Simplifica la expresion algebraica

29 - 21 \cdot \frac{-19 + 3 x}{7}

Simplifica la expresion algebraica

19 - 16 \cdot \frac{15 - 6 x}{8}