Cine poate sa rezolve acest exercitiu?Va rog sa ma ajutati!!!

1+1/2=3/2
1-1/2=1/2
2/5+3/4=23/20
4/5-2/3=2/15
Rezolvare:
(1+1/2)/(1-1/2)×(2/5+3/4)/(4/5-2/3)=
3/2:1/2×23/20:2/15=
3/2×2/1×23/20×15/2=
3×23/4×3/2=
69/4×3/2=
207/8