ACTIVITY 3: subtract the following polynomials

1.) 2a- 3b+8
- 7a -8b - 10

===> 2a -3b + 8
________

2.) 4× - 10y - 8
= 12× -8y + 16

===> 4× - 10y - 8
_________

3.) (8× + 3y - 18 ) - ( - 10× - 18) =

4.) (-4d - 9e +10f +12) - (9d + 12) - ( 9d +12e - 18f -20)​