If #color(white)("XXX")color(red)a=color(red)0#, and #color(white)("XXX")color(blue)b=color(blue)6#, and #color(white)("XXX")color(green)(x)=color(green)8#
then #color(white)("XXX")color(red)a(color(blue)b^color(green)x)=color(red)0(color(blue)b^color(green)x)=0#