0.25的九次方×2的二十次方×25的九次方×64³ =0.25的九次方×4的十次方×25的九次方×4 的九次方=(0.25×4)的九次方×4 ×(25×4 )的九次方=1的九次方×4 ×(100)的九次方=40000000003的十八次方×(-1/9)的八...［（x-y)²（x+y）³]²求解［（x-y)²（x+y）³]²
=(x-y)^4(x+y)^6