Question

-7mn-5,12mn+2,9mn-8,-2mn-3​

Answer 1

Answer:

(−7mn+5)+(12mn+2)+(9mn−8)+(−2mn−3)

=−7mn+5+12mn+2+9mn−8−2mn−3

=12mn−4

Answer 2

the answer of your question is here hope it was helpful.