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b) -4x-4y
c) 5x-5
d) -3a+3a²
e) t-2s-1
f) a-2b+½
g) 2m² +3m
h) 6pr+15p²-3p
i) 2xykwadrat-3xy²+5xy
b) -4x-4y
c) 5x-5 = -5+5x
d) -a + 3a²
e) t-2s-1= -2s+t-1
f) a-2b+1/2
g) 2m² +3m
h) 6pr +15p² -3p
i) 2xy² - 3xy² +5xy = -xy² +5xy