Question

(a-b)+(2a+3b+c)+(-3a+5b-2c)

Answer 1

7b - c
Espero que te sirva

Answer 2

(a-b)+(2a+3b+c)+(-3a+5b-2c)
=a-b+2a+3b+c-3a+5b-2c
=-b+3b+c+5b-2c
=9b+c-2c
=9b-c