how much is 3mn + 9op more than 122mn- 2op? pls hurry tom . is mine maths paper

We have to calculate the difference between ( 3mn + 9op) and  (122mn -2op) 

=( 3mn + 9op)-( 122mn -2op)

= 3mn + 9op- 122mn +2op)

=  - 119mn +  11op  

(3mn + 9op) more than (122mn- 2op) by ( - 119mn +  11op )