plis tolong jawab soalnya mau di kumpulin besok sama caranya yah no 2 sampai 5

1 .E.a^m:a^n=a^m/n
2. 256^1/4-81^3/4+(1/343)^-2/3
2^8×1/4-3^4×3/4+7^-3×-2/3
2^2-3^3+7^2
4-27+49
=26
jawabannya c. 26

3. ²log16+³log27-5log1
4+3-0
=7
jawabannya E. 7

4. (a³.b^-².c^5/a^-².b^7.c⁴)²
a³*².b^-²*².c^5*2/a^-²*².b^7*2.c⁴*²
a^6.b^-⁴.c^10/a^-⁴.b^14.c^8
a^6.b^14.c^10/a^⁴.b^⁴.c^8
a².b^10.c²
jawabannya a

5. 2√32-3√18+√72
2√16.2-3√9.2+√36.2
2.4√2-3.3√2+6√2
8√2-9√2+6√2
8-9+6√2
5√2
jawabannya b