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Would that make more sense as:

A+B=C and then C+D.

C + D, in your formula, would put the final part before the first two.
 
Would that make more sense as:

A+B=C and then C+D.

C + D, in your formula, would put the final part before the first two.

Unless I would have described like this (which I forgot):

Subtitle 1 = A
Subtitle 2 = B
Subtitle 3 = C

A + B = Subtitle 1 + Subtitle 2 = D

D + C = Subtitle (1+2) + Subtitle 3 = complete

(as C+D would put the final part before the two first parts, as you pointed out) 🙂
 
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