Prevent a sum from simplifying?
96943
Getting terms and only evaluate specific parts
87213
Summing a comma separated column in MySQL 4 (not 5)
74315
Constraint on variables in summation
37178
python's sum() and non-integer values
104378
Minimizing weighted sum
68007
Sum or Product with Exclusions
48200
Simplify $\sum_{i=0}^n (i+1)\binom ni$
12813
Integer summing blues, short += short problem
116051
Using SUM on FLOAT data
7756
LaTeX adjusting \sum limits
113331
Number of ways a natural number can be written as sum of smaller natural number
43406
fp - How to keep running sum in variable?
117173
Sum the values in a column except the header
120958
PHPExcel Sumif and Skip
32184
Summation notation problem
8286
How much can a sum of fractions reduce?
139237
How to sum over duplicates?