you can add two digits without carry with int('01234567890123456789'[i:][j:][0])
of course, you'll need appropriate substitute expressions for '01234567890123456789' and 0
this can be generalized to add with carry

0: ord(min(`[]`))-ord(min(`[]`))
-1: ~(ord(min(`[]`))-ord(min(`[]`)))

1: int(`~(ord(min(`[]`))-ord(min(`[]`)))`[~(ord(min(`[]`))-ord(min(`[]`)))])

2: int(min(`ord(min(`(`()`.find)`))`))

3: int(`ord(min(`(`()`.find)`))`[ord(min(`[]`))-ord(min(`[]`))])

4: int(`ord(`ord(min(`[]`))-ord(min(`[]`))`)`[ord(min(`[]`))-ord(min(`[]`))])

5: int(`int(oct(ord(min(`()`))))`[ord(min(`[]`))-ord(min(`[]`))])

32: ord(min(`(`()`.find)`))

40: ord(min(`()`))

50: int(oct(ord(min(`()`))))

48: ord(`ord(min(`[]`))-ord(min(`[]`))`)