Trick for converting integral to a sum
119572
Finding the integral of $\frac{x}{e^x + 1}$
44681
Inverse of a function's integral
130670
Solving Integrals
24508
Series as an integral (sophomore's dream)
7835
Tricky elementary integral $\int_{0}^{\frac{\pi}{2}}x\cot(x)dx$.
101908
Solving summations of form $\sum_{i=0}^{\infty} i^kx^i$ without Differentiation and Integration
124677
Substitution needed for calculating an integral
108554
Integrating $\int_0^\infty\frac{1}{1+x^6}dx$
87733
Calculate the Gauss integral without squaring it first
146274
Fastest way to do this double summation?
51216
Different ways to tackle the integral $\int_0^1\sqrt\frac x{1-x}\,dx$
18975
How to 'sum' a standard deviation?
31529
Integrating $\int^2_{-2}\frac{x^2}{1+5^x}$
98757
Solving an integral with substitution method
99139
Pulling constants out of integrations
115131
Proof that sum of integrals of same function on adjacent intervals equals the integral over both intervals
19556
Finding constant to make integrals converge