Uh, in algebra, a negative number times a negative number gives a positive number...
Ooops, I missed the first negative sign. Thanks for the heads up on my missing that!
But in the immortal words of PeeWee Herman, you meant to do to that, right?
Of course not, it was just an honest mistake in reading and only a stupid person desperate to appear relevant would even try to make such a Barney Fife accusation.
P.S. When you make a mistake and acknowledge it, you don't look like such a tool as when you insist you're right all the time (even after having your obvious rookie mistakes pointed out) and then angrily striking out at the person who pointed out your errors. You should try it sometime. Needing to be right all the time is the sign of an immature and insecure mind.