(-2a^2b)^2*3ab^3/(-6a^3b)
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(-2a^2b)^2*3ab^3/(-6a^3b)(-2a^2b)^2*3ab^3/(-6a^3b)(-2a^2b)^2*3ab^3/(-6a^3b)=-8a^4b^2×3ab^3/(-6a^3b)=
(-2a^2b)^2*3ab^3/(-6a^3b)
(-2a^2b)^2*3ab^3/(-6a^3b)
(-2a^2b)^2*3ab^3/(-6a^3b)
=-8a^4b^2 ×3ab^3/(-6a^3b)
=4a^2b^4