Expand the expression
(m -4)2

1  add the whole numbers first
6+\frac{5}{76}+\frac{7}{8}6+​76​​5​​+​8​​7​​
2  find the least common denominator (lcd) of  \frac{5}{76}, \frac{7}{8}​76​​5​​,​8​​7​​lcd =  1523  make the denominators the same as the lcd
6+\frac{5\times 2}{76\times 2}+\frac{7\times 19}{8\times 19}6+​76×2​​5×2​​+​8×19​​7×19​​
4  simplify. denominators are now the same
6+\frac{10}{152}+\frac{133}{152}6+​152​​10​​+​152​​133​​
5  join the denominators
6+\frac{10+133}{152}6+​152​​10+133​​
6  simplify
6\frac{143}{152}6​152​​143​​

done: )