Compute
\frac{1}{1 \times 4} + \frac{1}{7 \times 10} + \frac{1}{37 + 40}
11⋅4+17⋅10+137+40=11⋅22+17⋅2⋅5+17⋅11=5⋅7⋅11+2⋅11+22⋅522⋅5⋅7⋅11=42722⋅5⋅7⋅11=7⋅6122⋅5⋅7⋅11=6122⋅5⋅11
!
1/4+1/70+1/77
1/70+1/77=21/770=3/110
3/110+1/4 = 61/220
correct me if i'm wrong!