Question

（三的三次方乘以三的六次方）减去（三的二次方乘以三的六次方）加上（三乘以负三的七次方）

Answer 1

3^3*3^6-3^2*3^6+3*(-3)^7 =3^9-3^8-3^8 =3^9-2*3^8 =3^8(3-2) =3^8 =6561