`7/5 - 57/36 xx (-6/19) + (-1/42) : 5/7`
`= 7/5 + 57/36 xx 6/19 - 1/42 xx 7/5`
`= 7/5 + 1/2 - 1/42xx 7/5`
`= 7/5 xx (1 - 1/42) +1/2`
`= 7/5 xx 41/42 + 1/2`
`= 287/210 + 105/210`
`= 392/210`
`= 196/105`
\(\frac75\) - \(\frac{57}{36}\) x (- \(\frac{6}{19}\)) + \(\left(\frac{-1}{42}\right)\) : (\(\frac57\))
= \(\frac75\) + \(\frac12\) - \(\frac{1}{42}\) x \(\frac75\)
= \(\frac75\times\left(1-\frac{1}{42}\right)\) + \(\frac12\)
= \(\frac75\times\frac{41}{42}\) + \(\frac12\)
= \(\frac{41}{30}+\frac12\)
= \(\frac{41}{30}+\) \(\frac{15}{30}\)
= \(\frac{56}{30}\)
= \(\frac{28}{15}\)
