In Excel (and some other languages), unary minus has higher precedence than exponentiation, so that -x^2 = (-x)^2 = x^2. That can bite you (for example when calculating the normal probability density function “manually”).
-3²
0-3²
?Source: have made this mistake. Have been flagged.
Brackets, exponents, division, multiplication, addition, subtraction.
Bedmas, Christmas in bed!