7/5+9/7+6/5+11/7

HhjfxhfzfjxhxdgzrhzrhzrhzhrxtjzhfzrhJrstkdykydtjxjycjjakksnbcjksjs

$\frac{7}{5}$ + $\frac{9}{7}$ + $\frac{6}{5}$ + $\frac{11}{7}$  

Ta có mẫu số chung là 35:

= $\frac{49}{35}$ + $\frac{45}{35}$ + $\frac{42}{35}$ + $\frac{55}{35}$

= $\frac{94}{35}$ + $\frac{42}{35}$ + $\frac{55}{35}$

= $\frac{136}{35}$ + $\frac{55}{35}$

= $\frac{191}{35}$