Students often make the mistake of squaring a negative that's not in parentheses. What will happen is that they look at it and say, "Okay, well, I've got this negative 3 squared. So that obviously ...

Many English grammar advice sites on the web are so dire that it almost seems rude to link to them. I don’t want to fail in my duty to clarify things by deconstructing them; yet it seems cruel to ...