<<< native [ ESuper (EIdentifier "x") (ENumber "1") , ESymbol Bin "+" , ESuper (EIdentifier "x") (EIdentifier "a") , ESymbol Bin "+" , ESuper (EIdentifier "H") (EIdentifier "a") , ESymbol Bin "+" , ESuper (EIdentifier "H") (ENumber "1") , ESymbol Bin "+" , ESubsup (EIdentifier "x") (ENumber "1") (ENumber "2") , ESymbol Bin "+" , ESubsup (EIdentifier "x") (EIdentifier "a") (ENumber "2") , ESymbol Bin "+" , ESubsup (EIdentifier "x") (ENumber "1") (EIdentifier "x") , ESymbol Bin "+" , ESubsup (EIdentifier "x") (EIdentifier "a") (EIdentifier "x") , ESymbol Bin "+" , ESubsup (EIdentifier "H") (ENumber "1") (ENumber "2") , ESymbol Bin "+" , ESubsup (EIdentifier "H") (EIdentifier "a") (ENumber "2") , ESymbol Bin "+" , ESubsup (EIdentifier "H") (ENumber "1") (EIdentifier "x") , ESymbol Bin "+" , ESubsup (EIdentifier "H") (EIdentifier "a") (EIdentifier "x") ] >>> eqn x sup 1 + x sup a + H sup a + H sup 1 + x sub 1 sup 2 + x sub a sup 2 + x sub 1 sup x + x sub a sup x + H sub 1 sup 2 + H sub a sup 2 + H sub 1 sup x + H sub a sup x