นิพจน์ 1: left parenthesis, StartFraction, "x" Over 60 , EndFraction , right parenthesis squared plus left parenthesis, StartFraction, "y" Over 80 , EndFraction , right parenthesis squared equals 1x602+y802=1
1
นิพจน์ 2: StartAbsoluteValue, "x" , EndAbsoluteValue less than or equal to 30 StartRoot, 2 , EndRoot left brace, StartAbsoluteValue, "y" , EndAbsoluteValue less than or equal to 40 StartRoot, 2 , EndRoot , right bracex≤302y≤402