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b) 5(7c-8d)
c) 6(8x-3+9)
d) 25(1-2a²+3a)
e) -1(a-2b+3c)
f) 2(-7p-10r-2s)
g) 7(-3m-5n-1)
h) 1,5(3a²-4a+1)