(-1/2)-2 means that the square of the reciprocal of this number =4.
|-2sin60| means to find twice the value of sin60 first and then the absolute value, =√3.
-√ 12 means to find its root,12 = 2 2 * 3, so =2√3.
(3+√ 5) 0 means to find the power of 0 of a number = 1.
Original formula =4+√3-2√3+ 1
=5-√3