3((12-8):2+69-33)
First, we solve the parentheses:
(12-8) = 4

Then, we perform division and multiplication from left to right:
4:2 = 2
6*9 = 54

Now, we substitute these values back into the equation and simplify:
3(2 + 54 - 33)
3(56 - 33)
3*(23)
69

Therefore, the result of the expression 3((12-8):2+69-33) is 69.