Question

(13/15÷-17/21)+(17/4-8/5+6/7)=

Answer 1

$( \frac{13}{15} \div - \frac{17}{21} ) + ( \frac{17}{4} - \frac{8}{5} + \frac{6}{7} )$

$- \frac{13}{15} \times \frac{21}{17} + \frac{491}{140}$

$- \frac{13}{5} \times \frac{7}{17} + \frac{491}{140}$

$- \frac{91}{85} + \frac{491}{140}$

$\frac{5799}{2380}$


Espero que sirva salu2!!!