Expand each of the following, using suitable identities:
@) (x + 2y + 4z)
(ii) (2r - y+z)
(iii) (-2x + 3y + 2z)?
(iv) (3a - 76-c)
(v) (-2x + 5y - 32)
(vi)
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vi) (-3x + 7y - c ) ... .. ....
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