(v) `int_(x=0)^(1)int_(y=0)^(1)(dxdy)/((x+y+1)^(2))`

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

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

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

int_(0)^(1)x^2dx

int_(0)^(1) x dx

int_(0)^(0.2)(1)/((x^(2)+1)^(2))dx

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

int_(0)^(1) (1)/(sqrt(1-x^(2)))dx

int_0^1int_0^1( 1/(x+y+1)^2)dxdy

Evaluate : (i) int_(0)^(1)sin^(-1)xdx , (ii) int_(1)^(2)(lnx)/(x^(2))dx , (iii) int_(0)^(1)x^(2)sin^(-1)xdx .