#1 (X-6)(x+6)= (3+x)(x-3)= (5x+8y)(8y-5x)= (M^5-n^3)(m^5+n^3)= #2 (b+6)(b-6)-3b(b+2= (3a-2)(3a+2)+(a-8)(a+8)=
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#1 #2