Summing pairs of elements in a list
61417
List of numbers giving a particular sum
73916
Common elements in two lists
2047
Combining Multiple Lists
108943
Combining the second elements of a set of ordered pairs based on their first element
22132
How to Map a subset of list elements to a function?
68000
Codewars: Sum of Pairs
131414
How to get a list of pairs into the form $(x,y)$?
28727
Interlacing a single number into a long list
60205
Sum in Mathematica gives extra "+List"
130945
Summation using residues
149807
Get a list of combinations of lists' elements
149010
Finding Combinations to the provided Sum value
103347
combinatorial proof of summation
113885
Summing Up A 2D Array
5872
Combining the entries of two lists
114863
Representing a given number as the sum of two squares.
116824
Find the sum of two elements in a matrix