103.
f+g={(−2, 3), (1, 0), (3, 2)}
fg={(−2, 0), (1,−4), (3, 0)}
fg={(1,−1), (3, 0)}
f∘g={(0, 1), (1, 3), (3, 1)}
105.
h(x)=h(x)+h(−x)2+h(x)−h(−x)2
107. (−∞,−2)∪[−1, 1]∪(2, ∞)
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