Integral Hangs

[lrdheat]

Still having surprises…in CAS, definite integral from -4 to 1 of (x^2 +2*x)/3Root(x^3 +3*x^2 +1) does not produce a symbolic result, has a problem with the undefined point at ~-3.1 and comes up with -1.57909212594

The CASIO CLASSPAD 400 comes up with a symbolic result of (-225^1/3)/2 + (25^1/3)/2 (equates to -1.579092129).

Why does the Prime have difficulty? (All this being said while recognizing the Prime as a superior platform…)