表达式3: "y" equals StartFraction, "N" squared Over "O" squared , EndFraction minus StartFraction, pi cos left parenthesis, StartNestedFraction, "O" "x" minus StartNestedFraction, "N" NestedOver StartRoot, 2 , EndRoot , EndNestedFraction NestedOver 2 pi , EndNestedFraction , right parenthesis Over "O" , EndFraction left brace, negative 0.6 5 less than "x" less than 0.6 5 , right brace left brace, negative 0.1 less than "y" less than 0.3 5 , right bracey=N2O2−πcosOx−N22πO−0.65<x<0.65−0.1<y<0.35
3
表达式4: "y" equals StartFraction, "N" squared Over "O" squared , EndFraction minus StartFraction, pi cos left parenthesis, StartNestedFraction, negative "O" "x" minus StartNestedFraction, "N" NestedOver StartRoot, 2 , EndRoot , EndNestedFraction NestedOver 2 pi , EndNestedFraction , right parenthesis Over "O" , EndFraction left brace, negative 0.6 5 less than "x" less than 0.6 5 , right brace left brace, negative 0.1 less than "y" less than 0.3 5 , right bracey=N2O2−πcos−Ox−N22πO−0.65<x<0.65−0.1<y<0.35
