3cot(pi/4) - 3cot^2(-pi/3) =
3(1/tan(pi/4)) - 3(1/tan(-pi/3))^2 =
3(1/1) - 3(1/(sqrt(3)))^2 =
3 - 3/(3) =
3 - 1 = 2
3cot(pi/4) - 3cot^2(-pi/3) =
3(1/tan(pi/4)) - 3(1/tan(-pi/3))^2 =
3(1/1) - 3(1/(sqrt(3)))^2 =
3 - 3/(3) =
3 - 1 = 2