\(2\sqrt{8\sqrt{3}}+2\sqrt{5\sqrt{3}}-3\sqrt{20\sqrt{3}}\\ =2.2\sqrt{2\sqrt{3}}+2\sqrt{5\sqrt{3}}-3.2\sqrt{5\sqrt{3}}\\ =4\sqrt{2\sqrt{3}}+2\sqrt{5\sqrt{3}}-6\sqrt{5\sqrt{3}}\\ =4\sqrt{2\sqrt{3}}+\left(2-6\right)\sqrt{5\sqrt{3}}\\ =4\sqrt{2\sqrt{3}}-4\sqrt{5\sqrt{3}}\)
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