" 1."int(1+x^(2))/(1+x^(4))dx

" Evaluate: "int(x(1+x^(2)))/(1+x^(4))dx

int (x(1-x^(2)))/(1+x^(4))dx

Evaluate int(x(1+x^(2)))/(1+x^(4))dx

Evaluate : int(x(1+x^(2)))/(1+x^(4))dx

Evaluate : int(x(1+x^(2)))/(1+x^(4))dx .

int(1)/(1+(x^(2))/(4))dx

(i) int((x^(2) - 1)/(x^(2) + 1))dx , (ii) int ((x^(6)- 1)/(x^(2) + 1))dx (iii) int ((x^(4))/(1+x^(2)))dx , (iv) int((x^(2))/(1+x^(2)))dx

int(x tan^(-1)x^(2))/(1+x^(4))dx

" (1) "int(2x^(2)+1)/(1-2(x^(2)+4))dx

" 1.If "int(1)/((x^(2)+1)(x^(2)+4))dx=G tan^(-1)x+H tan^(-1)((x)/(2))+C,C in A." Then "G=.......,H=...?