TRS: { a__and(tt(), X) -> mark(X), a__plus(N, 0()) -> mark(N), a__plus(N, s(M)) -> s(a__plus(mark(N), mark(M))), a__x(N, 0()) -> 0(), a__x(N, s(M)) -> a__plus(a__x(mark(N), mark(M)), mark(N)), mark(and(X1, X2)) -> a__and(mark(X1), X2), mark(plus(X1, X2)) -> a__plus(mark(X1), mark(X2)), mark(x(X1, X2)) -> a__x(mark(X1), mark(X2)), mark(tt()) -> tt(), mark(0()) -> 0(), mark(s(X)) -> s(mark(X)), a__and(X1, X2) -> and(X1, X2), a__plus(X1, X2) -> plus(X1, X2), a__x(X1, X2) -> x(X1, X2)} Fail