" 21."^(" s ")" (i) "int(2x^(3))/(4+x^(8))dx" (ii) "

I=int(2x^(3)+4x+1)/(x)dx

int(4x^(3))/(8^(2)+x^(4))dx

3. int(4x^(3))/(8^(2)+x^(4))dx

int(2^(8x+3))/(2^(4x+3))dx:

Evaluate : (i) int(3x^(2))/((1+x^(6)))dx (ii) int(x^(3))/((x^(2)+1)^(3))dx (iii) (x^(8))/((1-x^(3))^(1//3))dx

(i)int(x^(3)-1)/(x^(2))dx(ii)int(x^(2/3)+1)dx

Evaluate: (i) int((x^(3)+8)(x-1))/(x^(2)-2x+4)dx (ii) int(a tan x+b cot x)^(2)dx

(i) int ((1+x)^(3))/(sqrt(x))dx " "(ii) int((1+x)^(3))/(x^(4)) dx

(i) int ((1+x)^(3))/(sqrt(x))dx " "(ii) int((1+x)^(3))/(x^(4)) dx

Evaluate: (i) int(cos2x+2s epsilon^(2)x)/(s in^(2)x)dx (ii) int(2cos^(2)x-cos2x)/(cos^(2)x)dx