表达式9: "x" Subscript, 2 , Baseline equals 2.8 9 5x2=2.895
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表达式10: "x" Subscript, 3 , Baseline equals 4.5 3 4x3=4.534
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表达式11: "u" equals StartFraction, left parenthesis, "x" Subscript, 1 , Baseline plus "x" Subscript, 2 , Baseline plus "x" Subscript, 3 , Baseline , right parenthesis Over 3 , EndFractionu=x1+x2+x33
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表达式12: left parenthesis, "u" , "f" left parenthesis, "u" , right parenthesis , right parenthesisu,fu
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表达式13: "y" equals left parenthesis, ln left parenthesis, "u" , right parenthesis plus 1 , right parenthesis left parenthesis, "x" minus "u" , right parenthesis plus "f" left parenthesis, "u" , right parenthesisy=lnu+1x−u+fu
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表达式14: left parenthesis, "u" , StartFraction, left parenthesis, "f" left parenthesis, "x" Subscript, 1 , Baseline , right parenthesis plus "f" left parenthesis, "x" Subscript, 2 , Baseline , right parenthesis plus "f" left parenthesis, "x" Subscript, 3 , Baseline , right parenthesis , right parenthesis Over 3 , EndFraction , right parenthesisu,fx1+fx2+fx33
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表达式15: left parenthesis, 0 , 0 , right parenthesis0,0
