" 3."int_(2)^(3)(x^(2)+1)dx

"int_(1)^(3)(2x^(2)+3)dx

int_(2)^(3)(dx)/(x^(2)-1)

int_(2)^(3) (2x)(1+x^2) dx

int_(1)^(3)5x^(2)dx

int_(-2)^(3) |1-x^(2)|dx=

int_(-1)^(1)(x^(2)-2x+3)dx

" 2."int_(0)^(1)(x^2)/(1+x^(3))dx

int_(1)^(oo)x^(-(3/2))dx

int_(1)^(2) (x^3+1) dx

If I_(1) = int_(0)^(1) 2^(x^(2))dx, I_(2) = int_(0)^(1) 2^(x^(3))dx , I_(3) = int_(1)^(2) 2^(x^(2))dx, I_(4)=int_(1)^(2) 2^(x^(3))dx then