表达式9: "f" Subscript, 1 , Baseline left parenthesis, "x" , right parenthesis equals left brace, "x" greater than 0 : 1 , 0 , right bracef1x=x>0:1,0
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表达式10: "f" Subscript, 2 , Baseline left parenthesis, "x" , right parenthesis equals exponent left parenthesis, negative left parenthesis, StartFraction, "x" Over "s" , EndFraction , right parenthesis squared , right parenthesisf2x=exp−xs2
10
表达式11: "s" equals 0.1 4s=0.14
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表达式12: "f" Subscript, 3 , Baseline left parenthesis, "x" , right parenthesis equals mod left parenthesis, sin left parenthesis, 12345.6 7 times "x" , right parenthesis times 12345.6 7 , 1 , right parenthesisf3x=modsin12345.67·x·12345.67,1
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表达式13: "A" Subscript, "r" "g" , Baseline left parenthesis, "y" , "x" , right parenthesis equals arc tangent left parenthesis, StartFraction, "y" Over "x" , EndFraction , right parenthesis plus pi times left brace, "x" less than 0 : sign left parenthesis, "y" , right parenthesis , 0 , right braceArgy,x=arctanyx+π·x<0:signy,0
