2 + 2 - 1 + 1267788 - 100
Using BODMAS (Order of operations);
We add first:
2 + 2 + 1267788 = 1267792
Secondly we subtract:
-1 - 100 = -101
Finally add the two answers:
1267792 + -101 = 1267691
One of the numbers are negative
Remember this... a negative divided by a positive will result in a negative and a negative divided by a negative will result in a positive, the same goes for multiplication
(3x+4) (2x-6)
6x-18x+4x-24
6x^{2} -14-24
"Over" usually means divide. First hint, check.
If we write it out, it looks like this:

This is the same as <em>some number divided by 7.</em>