You can access the elements in a list-of-lists by first specifying which list you're interested in and then specifying which element of that list you want. For example, 17
is element 2
in list 0
, which is list1[0][2]
:
>>> list1 = [[10,13,17],[3,5,1],[13,11,12]]
>>> list1[0][2]
17
So, your example would be
50 - list1[0][0] + list1[0][1] - list1[0][2]
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