YES (VAR x y z) (RULES multiply(x,inverse(x)) -> identity() inverse(inverse(x)) -> x multiply(inverse(x),x) -> identity() multiply(inverse(x),multiply(x,y)) -> y multiply(x,multiply(inverse(x),y)) -> y multiply(multiply(x,y),z) -> multiply(x,multiply(y,z)) inverse(identity()) -> identity() multiply(x,identity()) -> x multiply(identity(),x) -> x double_divide(y,x) -> multiply(inverse(y),inverse(x)) inverse(multiply(y,x)) -> multiply(inverse(x),inverse(y)) )