TRS: { a__terms(N) -> cons(recip(a__sqr(mark(N))), terms(s(N))), a__sqr(0()) -> 0(), a__sqr(s(X)) -> s(a__add(a__sqr(mark(X)), a__dbl(mark(X)))), a__dbl(0()) -> 0(), a__dbl(s(X)) -> s(s(a__dbl(mark(X)))), a__add(0(), X) -> mark(X), a__add(s(X), Y) -> s(a__add(mark(X), mark(Y))), a__first(0(), X) -> nil(), a__first(s(X), cons(Y, Z)) -> cons(mark(Y), first(X, Z)), a__half(0()) -> 0(), a__half(s(0())) -> 0(), a__half(s(s(X))) -> s(a__half(mark(X))), a__half(dbl(X)) -> mark(X), mark(terms(X)) -> a__terms(mark(X)), mark(sqr(X)) -> a__sqr(mark(X)), mark(add(X1, X2)) -> a__add(mark(X1), mark(X2)), mark(dbl(X)) -> a__dbl(mark(X)), mark(first(X1, X2)) -> a__first(mark(X1), mark(X2)), mark(half(X)) -> a__half(mark(X)), mark(cons(X1, X2)) -> cons(mark(X1), X2), mark(recip(X)) -> recip(mark(X)), mark(s(X)) -> s(mark(X)), mark(0()) -> 0(), mark(nil()) -> nil(), a__terms(X) -> terms(X), a__sqr(X) -> sqr(X), a__add(X1, X2) -> add(X1, X2), a__dbl(X) -> dbl(X), a__first(X1, X2) -> first(X1, X2), a__half(X) -> half(X)} Fail