`int_(l)^(l+1)(x^(2))/(sqrt((x^(3)-1)))dx`

int_(1)^(2)(dx)/((x+1)sqrt(x^(2)-1))

Let l_(1)=int_(0)^(1)(e^(x))/(1+x)dx and l_(2)=int_(0)^(1)(x^(2))/(e^(x^(3))(2-x^(3)))dx. "Then"(l_(1))/(l_(2)) is equal to

int_()^()(dx)/(x sqrt(1+x^(3)))

int_(1)^(2)(dx)/(sqrt(x^(2)+4x+3))

int_(1)^(2)(1)/(x sqrt(x^(2)-1))dx=

int_(0)^(1)(dx)/((x+sqrt(x^(2)+1))^(3))=

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

int_(1)^(2)(x^(3)+x+1)/(sqrt(x))dx=

int_(0)^(1)x^(3)sqrt(1-x^(2))dx=

int_(0)^(1)x^(3)sqrt(1-x^(2))dx=