`(-3/4)+(-1/4)+2/7+5/7+3/5`
`=[(-3/4)+(-1/4)]+(2/7+5/7)+3/5`
`=-4/4+7/7+3/5`
`=-1+1+3/5`
`=0+3/5`
`=3/5`
-3/4 + -1/4 + 2/7 + 5/7 + 3/5
= (-3/4 + -1/4) + (2/7 + 5/7) + 3/5
= (-1 + 1) + 3/5
= 0 + 3/5
= 0
(−34)+(−14)+27+57+35(-34)+(-14)+27+57+35
=[(−34)+(−14)]+(27+57)+35=[(-34)+(-14)]+(27+57)+35
=−44+77+35=-44+77+35
=−1+1+35=-1+1+35
=0+35=0+35
=35