<<< tex u'' + p(x)u' + q(x)u=f(x),\quad x>a >>> native [ EIdentifier "u" , ESymbol Ord "\8243" , ESymbol Bin "+" , EIdentifier "p" , EDelimited "(" ")" [ Right (EIdentifier "x") ] , EIdentifier "u" , ESymbol Ord "\8242" , ESymbol Bin "+" , EIdentifier "q" , EDelimited "(" ")" [ Right (EIdentifier "x") ] , EIdentifier "u" , ESymbol Rel "=" , EIdentifier "f" , EDelimited "(" ")" [ Right (EIdentifier "x") ] , ESymbol Pun "," , ESpace (1 % 1) , EIdentifier "x" , ESymbol Rel ">" , EIdentifier "a" ]