Choose the Correct Letter for Each Question $P = 2 + 2 x - z$

Multiple Choice

Choose the correct letter for each question.
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A) $P = 2 + 2 x - z$
B) $L = 4 x - 5 y + 6 x z$
C) $L = 3 x + 6 y + 6 x y - 6 y ^ { 2 }$