Expression 12: "f" left parenthesis, "x" , right parenthesis equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesisfx=m1x−D1
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Expression 13: "g" left parenthesis, "x" , right parenthesis equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesisgx=m2x−B1
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Expression 14: "f" left parenthesis, "C" Subscript, 1 , Baseline , right parenthesis tilde "g" left parenthesis, "C" Subscript, 1 , Baseline , right parenthesisfC1~gC1
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Expression 15: "C" Subscript, 2 , Baseline equals "g" left parenthesis, "C" Subscript, 1 , Baseline , right parenthesisC2=gC1