What is 1:2 plus 2:6 plus 3:12 plus 4:20 plus 5:30 plus 6:42 Simple operation,

What is 1:2 plus 2:6 plus 3:12 plus 4:20 plus 5:30 plus 6:42 Simple operation,

1 + 2 + 3 + 4 + 5 + 6 + 1 / 2 + 1 / 6 + 1 / 12 + (score only)
=1+2+… + 6 + (1-half + half-one-third +...)
The key to this problem is to replace the fraction with the sum of integers and fractions, one-half with 1-half, one-sixth with one-half minus one-third, and so on. All these can be eliminated later!