There is something wrong with the order of operations. When I type 2+2*2-6 i get -6 which should be 0.
3 ^ 1 * 2 6
3 ^ 1 / 2 1.73205
3 ^ 1 + 2 5
3 ^ 1 - 2 19 - 3 ^ 2 = 0
9 -3 ^ 2 = 18 ???
pi = 3.1415926536
2 pi = 5.1415926536 ???
sin(3.1415926536 radians) = -0
sin(pi radians) = Incompatible units ???