YES TRS: minus(minus(x)) -> x minux(+(x,y)) -> +(minus(y),minus(x)) +(minus(x),+(x,y)) -> y +(+(x,y),minus(y)) -> x max/plus interpretations on N: minus_A(x1) = max{4, 1 + x1} minus#_A(x1) = max{0, 3} minux_A(x1) = max{5, 1 + x1} minux#_A(x1) = max{4, 4} +_A(x1,x2) = max{3, 1 + x1, 1 + x2} +#_A(x1,x2) = max{2, 1, -1} precedence: minux > + > minus