Sagot :
4/3-7/5-(3/5-5/7)=
4/3-7/5-(21/35-25/35)=
4/3-7/5-(-4/35)=
140/105-147/105+12/105=
5/105=1/21
3/7 + 3/4 - 5/2 - 17/8
12/28 + 21/28 - 20/8 - 17/8
33/28 - 37/8
66/56 - 259/56
-193/56
4/3-7/5-(3/5-5/7)=
4/3-7/5-(21/35-25/35)=
4/3-7/5-(-4/35)=
140/105-147/105+12/105=
5/105=1/21
3/7 + 3/4 - 5/2 - 17/8
12/28 + 21/28 - 20/8 - 17/8
33/28 - 37/8
66/56 - 259/56
-193/56