Nuprl - Proof: qadd assoc 1 1 1

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At: qadd assoc 1 1 1

1. p :

2. q :

3. r :

p +q q +q r.num

p +q q +q r.den = p +q q +q r.num

p +q q +q r.den

By:	OnHyps [3;2;1] RatHD THEN Unfold `qadd` 0 THEN RW (DepthC qnd_evalC) 0

Generated subgoal:

1 1. p1 :
2. p2 :
3. q1 :
4. q2 :
5. r1 :
6. r2 :
((p1q2+q1p2)r2+r1p2q2)p2q2r2 = (p1q2r2+(q1r2+r1q2)p2)p2q2r2
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