表达式3: "w" Subscript, "z" , Baseline equals left brace, negative 1 less than or equal to "z" less than or equal to 0 : "z" plus 1 , StartFraction, 1 Over 1 minus "z" , EndFraction , right bracewz=−1≤z≤0:z+1,11−z
3
表达式4: "w" equals "w" Subscript, "z" , Baseline times "w" Subscript, "x" , Baselinew=wz·wx
4
表达式5: "y" equals left brace, 0 less than or equal to "w" less than or equal to 1 : "w" minus 1 , 1 minus StartFraction, 1 Over "w" , EndFraction , right brace left brace, negative 1 less than or equal to "x" less than or equal to 1 , right bracey=0≤w≤1:w−1,1−1w−1≤x≤1
