(p-q)^6·(q-p)÷(q-p)^8
=(p-q)^6·[-(p-q)]÷[-1*(p-q)]^8
=-(p-q)^6·(p-q)÷(p-q)^8
=-(p-q)^(6+1-8)
=-(p-q)^(-1)
=-1/(p-q)
(p-q)^6·(q-p)÷(q-p)^8
(p-q)^6·(q-p)÷(q-p)^8
=(p-q)^6·[-(p-q)]÷[-1*(p-q)]^8
=-(p-q)^6·(p-q)÷(p-q)^8
=-(p-q)^(6+1-8)
=-(p-q)^(-1)
=-1/(p-q)