I can't get images to upload, either. This is why I try to learn to communicate more effecitvely through the written word.

Not everyone will open an external link. Try harder to type what you need. Learning just a little LaTeX could help quite a bit.

We have only volunteers who wander by when they have the time. If you need instant answers, you should consider paying a higher fee than you are charged, here.

There is no "minus sign" or "subtraction sign" in your problem statement. The technical term for that would be "Unary Minus" or simply "Negative Sign". A "minus sign" (certainly a "subtractino sign") would indicate subtraction and you've none of that. The presence of a negative sign in front of a fraction indicates the fraction is multiplied by -1. Note these:

(-1)^1 = -1

(-1)^2 = 1

(-1)^3 = -1

(-1)^4 = 1

It's like a little pulsar!

Do you now see where your negative sign went?