Answer:
Step-by-step explanation:
You have to group all of the same one's together and however many there is, you add that number as the exponent.
There were 2 "(-2)" so that became
, and there were 5 "7" so that became
. You keep the symbol and put it together which became 
Answer:
N=15
Step-by-step explanation:
Becuase math is math
Answer:
3 or 4, depending on the intended meaning of [x]
Step-by-step explanation:
Perhaps you mean ...

__
On the other hand, perhaps you mean ...

Answer:
jhzbsbsbbsgsbsb
Step-by-step explanation:
uy3hsbbzgauajdbgaushsbs