!7

sS text = [[

  i started 5 years ago

  current year is 2019

  2019-5 = 2014

  i started in 2014

]];

p-exp {

  S text, SS map = unpair replaceNumbersWithABCDollarVars(main.text);

  map = reverseMap(map);

  print(text);

  printStruct(map);

  new Matches m;

  for (S s : tlft(text))

    if (jmatch("*-* = *", s, m)) pcall {

      print(s);

      S a = getOrKeep(map, $1), b = getOrKeep(map, $2), c = getOrKeep(map, $3);

      print(a + " - " + b + " = " + c);

      if (eq(minus(bigint(a), bigint(b)), bigint(c))) {

        print("  correct!");

        print("  so: " + $3 + " = " + $1 + " - " + $2);

      }

    }

}