2道幂的计算!

1.(-2a)^6-(-3a^3)^2-[-(2a)^2]^3
=(-2)^6a^6-(-3)^2(a^3)^2+2^3(a^2)^3
=64a^6-9a^6+8a^6
=63a^6

2.(2×10^2)^2×(3×10^3)^3×(1×10^4)^4
=2^2×(10^2)^2×3^3×(10^3)^3×1^4×(10^4)^4
=4×10^4×27×10^9×10^16
=108×10^(4+9+16)
=1.08×10^2×10^29
=1.08×10^31

3.(2/3*a^2*b^5)^2*(－9/5ab^3*c^2)
=4/9*a^4b^5*(-9/5)ab^3c^2
=-4/5*a^5b^8c^2

1=2a^6-3a^6+4a^6=3a^6
2=(4*10^4)*(27*10^6)*(1*10^6)=108*10^26
3=-4/5*a^5*b^13*c^2