表达式6: "y" equals left brace, "x" Superscript, left parenthesis, "m" times 0.0 0 1 , right parenthesis , Baseline less than or equal to "t" : min left parenthesis, "x" Superscript, left parenthesis, "m" times 0.0 0 1 , right parenthesis , Baseline , "l" , right parenthesis , min left parenthesis, "t" plus min left parenthesis, left parenthesis, "x" minus 670000 , right parenthesis Superscript, left parenthesis, "m" Subscript, 2 , Baseline times 0.0 0 1 , right parenthesis , Baseline , "l" , right parenthesis , "l" , right parenthesis , right bracey=xm·0.001≤t:minxm·0.001,l,mint+minx−670000m2·0.001,l,l
