Math Problem With Weird symbols I can’t solve! HELP!!!!

Question

Here is the problem and the * and : symbols are confusing. I thought you would multiply first and get 2 times 2 is 4 then 4 minus 4 is zero? Many thanks!

4-2*2=:

Answer 1

You're right

4-2*2 = 4-4 = 0

PEMDAS is the order of operations with M before S

Multiply before Subtraction