restart;
A := int(x^5/sqrt(25+16*x^2), x);
A;
simplify(A);
factor(A);
f := unapply(A, x);
B := f(7)-f(2);
Digits := 600;
evalf(B);
Digits := 16;
evalf(B);
A3 := int(x^5/sqrt(9*x^2-4*x), x = 2 .. 7);