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b)5(5a-1)
c)0,6(a+1)
d)1/3(1-a)
e)2 2/5(a+1)
f)3(4b+3)
g)
h)2(11b+3)
i)0,2(2-1b)
j)1/6(1b+5)
k)2(10b+3c)
l)
m)0.4(4a-6c)
n)0.5(5a+b)