`[{(-1/2)^2}^-2]^-1` is equal to

int {((lnx-1))/(1+(lnx)^2)}^2 dx is equal to

If 0 < x <1, then sqrt(1+x^2)[{xcos(cot^-1x)+sin(cot^-1 x)}^2-1]^(1/2) is equal to

(a+1)(a-1)(a^2+1) is equals to:

1/2tan^(- 1)(12/5) is equal to

cot^(-1)(-2) is equal to

The solution of (dy)/(dx)=((x-1)^2+(y-2)^2tan^(- 1)((y-2)/(x-1)))/((x y-2x-y+2)tan^(- 1)((y-2)/(x-1))) is equal to

(1+2i)/(1+3i) is equal to

lim_(x to 1) (x^(2) + x - 2)/(x^(2) - 1) is equal to

2 tan^(-1) (-2) is equal to

cos^(-1) (cos (2 cot^(-1) (sqrt2 -1))) is equal to