= (23*4^3 - 40*2^3 - 8*(-1)^3)/20
= (23*4^2 - 40*2^2 - 8*(-1)^2)/20
= (23*4^1 - 40*2^1 - 8*(-1)^1)/20
= (23*4^0 - 40*2^0 - 8*(-1)^0)/20
= (4^1 - (5*1 + 1)*(-1)^1)/5
= (4^0 - (5*0 + 1)*(-1)^0)/5
(a+m)n
(am)n
(-2) •(5a^3bc^2-12ab^2)
