" 27."int_(0)^(2)(1)/(4+x-x^(2))dx

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

" (2) "int_(0)^(2)(2x)/(x^(2)-4)dx

int_(0)^(1)(1)/(x^(2)+4x+5)dx =

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

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

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

If 2int_(0)^(1)tan^(-1)xdx=int_(0)^(1)cot^(-1)(1-x+x^(2))dx then int_(0)^(1)tan^(-1)(1-x-x^(2))dx is equal to

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

int_(0)^(1)x^(4)(1-x)^(5//2)dx=