4 / | | | / _______ ___\| | |y*\\/ 4 - x - \/ x /| dy | / 0
Integral(Abs(y*(sqrt(4 - x) - sqrt(x))), (y, 0, 4))
| ___ _______| 8*|\/ x - \/ 4 - x |
=
| ___ _______| 8*|\/ x - \/ 4 - x |
8*Abs(sqrt(x) - sqrt(4 - x))
Use the examples entering the upper and lower limits of integration.