A way to simplify an expression so it's easier to use it for computation?
83720
Find subexpression to minimize leafcount after replacment with temporary variable
74149
Reducing an indicator function summation into a simpler form.
32511
How do I evaluate only one step of an expression?
116722
Simplifying $\big(\sum_{i=0}^n\binom{k}{i}\binom{M-k}{n-i}\frac{k-i}{M-n}\big)/{\binom{M}{n}}$
42127
How to force equation to be closer to the sum operator?
73242
Simplify vector expression - is there something like "Factor" for vectors, dot products etc.?
18854
Convert an expression to a Function
5634
Neglect higher order derivatives in expression
127431
What is the equation for a string fixed at both ends without simplifying assumptions?
9118
Polynomial division: an obvious trick? [reducing mod $\textit{simpler}$ multiples]
12852
How to simplify complicated Recursion.
102816
multiplication equivalent of the summation symbol
33199
Least value of an Expression?
118024
Simplify the expression $\binom{n}{0}+\binom{n+1}{1}+\binom{n+2}{2}+\cdots +\binom{n+k}{k}$
131232
Simplifying the expression of a product of inner products
125115
Simplifying Large Bases with large Exponents
81968
Displaying equations, how to combine strings and values without evaluating everything.