math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: John had some Beg. Tara gave him 2 more. Now John has 12 Beg. 
sentence 2:  John had 10 Beg earlier.
<equate> (12 - 2, 10)
John had some Beg. Tara gave him 2 more. Now John has 12 Beg. 
 John had 10 Beg earlier.