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b) 3a+3b
c) 4a+b
d) 2x-3y
e) 3x-2y+4z
f) -2x+3y-4z+5
b)3a + 3b
c)4a + b
d)2x - 3y
e)3x-2y + 4z
f)-2x+3y-4z+5
3a + 3b
4a + b
2x - 3y
3x-2y + 4z
-2x+3y-4z+5