@its_mizuko_ PEMDAS, parentheses first, exponent, multiplication, division, add, and then subtraction
Square root of 144 is 12, of 36 is 6. 12 over 6 is 2. Now we got 2 to the power of 2, that makes it 4.
If you (Mizuko) think this is wrong, post your answer and we’ll see.