How do you evaluate #5^2*(-3)-4*6+7#?
Let's use the rules of operator precedence, "PEMDAS":
In any expression with different operations, it is important to COUNT terms first. Each term will simplify to a single answer.
Within each term the order of operations is applied:
Powers and roots
multiply and divide
You can work in different terms in the same line.
Once there is a single answer to each term, these are added or subtracted in the last step, working from left to right.
It is often easier to re-arrange the terms with the plus terms at the beginning and the minus terms at the end.