1 / | | /x\ | 2*x*atan|-| dx | \3/ | / 0
Integral((2*x)*atan(x/3), (x, 0, 1))
/ | | /x\ /x\ 2 /x\ | 2*x*atan|-| dx = C - 3*x + 9*atan|-| + x *atan|-| | \3/ \3/ \3/ | /
-3 + 10*atan(1/3)
=
-3 + 10*atan(1/3)
-3 + 10*atan(1/3)
Use the examples entering the upper and lower limits of integration.