Hi There!
Alright- Lets do this!
#1: PEMDAS
P
E
M/D
A/S
(8 + 7) - (8 x 9) + 800 + (50 + 90) + (8 x 9) - (11 - 25)
P - Parentheses
15 - 72 + 800 + 140 + 72 - (-14)
E - Exponents
There are none
M- multiply
there are none
D-Divide
There are none
Add
15 - 72 + 800 + 140 + 72 - (-14)
15 - (72+800+140+72 + 14)
*Note: subtracting a negative number is the same as adding it!*
15-1098
S - subtract
Answer: -1083
Hope this helped!