`1/6 + 2/12 + 4/45 + 6/135 + 5/300 + 2/440`

`= 1/6 + 1/6 + 4/45 + 2/45 + 1/60 + 1/220`

`= (1/6 + 1/6) + (4/45 + 2/45) + 1/60 + 1/220`

`= 2/6 + 6/45 + 1/60 + 1/220`

`= 1/3 + 2/15 + 1/60 + 1/220`

`= 220/660 + 88/660 + 11/660 + 3/660`

`= (220+88+11+3)/660`

`= ((220+2)+(88+11+1))/660`

`= (222+100)/660`

`= 322/660`

`= 161/330`