Add - 7+5,12mn+2,9mn-8,-2mn-3 Share with your friends Share 0 Sachin Kumar answered this 12mn-4 -2 View Full Answer Glaxy answered this Hw to do this 0 Glaxy answered this -7mn+5,12mn+2,9mn-8,-2mn-3 0 Sri Nithish answered this I am senthilian 1 Bhavisha Devi answered this 2nd chapter formula 1 Didjnf answered this Xxdyneuyn4unu35m 0 Didjnf answered this Minus 7 MN + 5 0