The value of `int_(1)^(2) (dx)/(x(1+x^(4))` is

The value of int_(1)^(3)(dx)/(x(1+x^(2))) is

The value of int_(0)^(oo)(dx)/(1+x^(4)) is (a) same as that of int_(0)^(oo)(x^(2)+1dx)/(1+x) (b) (pi)/(2sqrt(2))( c) same as that of int_(0)^(oo)(x^(2)+1dx)/(1+x^(4))(d)(pi)/(sqrt(2))

The value of int_(0)^(2)|1-x|dx

The value of int_(1)^(e^(2)) (dx)/(x(1+logx)^(2)) is

The value of int_(0)^(1)(x^(2))/(1+x^(2))dx is

The value of int_(1)^(4){x}^([x])dx

int_(1)^(2)((dx)/(x(x^(4)+1))) is equal to

The value of int_(-2)^(2)x(x-1)dx is:

int_(0)^(1)(2x)/((1+x^(4)))dx

The value of int_(1)^(2)(x^(2)+1)/(x^(4)-x^(2)+1)log(1+x-1/x)dx is