=6a^2-8b^2-3ab-7a
2. Polynomial = (n-2) x 2+(m-5) x- 1
So n-2=0 and m-5=0.
The solution is n=2 and n=5.
3, according to the given program
1* 1=2
(1+1) *1= 2+1,which means 2* 1=3.
2*( 1+ 1)=3-2, which means 2*3= 1.
(2+1) * 3 =1+1means 3*3=2.
3*(3+ 1)=2-2, which means 3*4=0.
(3+ 1)*4=0+ 1, which means 4*4= 1.
4*(4+ 1)= 1-2, which means 4*5=- 1.
(4+1) * 5 =-1+1means 5*5=0.
5*(5+ 1)=0-2, which means 5*6=-2.
(5+ 1)*6=-2+ 1, which means 6*6=- 1.
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