Weiss: I've found and solved all bonuses, and actually helped in the creation of the map. I was wondering if anyone else had.
Gothtec: Well, you're in the 40+ levels, so they get a bit harder. 41 is actually a fork, so you should find both solutions. The L= 12 OR (S = 16 and 6 + 8 + 13 = 6) is a BIG HINT. Similar to level 11, there are two ways you can isolate certain numbers. Then figure out what the equations mean, and find the answer!