Rótulo oculto: left parenthesis, "a" , "b" , right parenthesisa,b
Rótulo
3
Expresión 4: StartFraction, "x" Over "a" , EndFraction plus StartFraction, "y" Over "b" , EndFraction equals 1xa+yb=1
4
Rótulo oculto: left bracket, left parenthesis, 0 , "b" , right parenthesis , left parenthesis, "a" , "b" , right parenthesis , left parenthesis, "a" , 0 , right parenthesis , right bracket0,b,a,b,a,0