answer this question as soon as possible (discrete math question)
1. let = { ∈ ℤ| = + 4 for some integer }, = { ∈ ℤ| = −2 for some integer b}, and = { ∈ ℤ| = + 16 for some integer }.
prove or disprove the following:
(a) ⊆
(b) ⊆
(c) = a

Multiply. −2x(6 x 4 −7 x 2 +x−5) express the answer in standard form. enter your answer in the box.

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