binOp :: Parser Expr
binOp = chainl1 (try num <|> try antiQuote <|> try labelref <|> try (parensExpr mathExpr)) mathOp
binOp :: Parser Expr
binOp = chainl1 (try num <|> try antiQuote <|> try labelref <|> try (parensExpr mathExpr)) mathOp
binOp = chainl1 (try num <|> try antiQuote <|> try labelref <|> try (parensExpr mathExpr)) mathOp