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1.5.4
problem 55
(a)
(
15
3
)
(
22
2
)
(
37
5
)
(b)
(
37
5
)
−
(
27
5
)
−
(
25
5
)
−
(
22
5
)
+
(
15
5
)
+
(
10
5
)
+
(
12
5
)
(
37
5
)
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