a, \(6\sqrt{3}-2\sqrt{12}+5\sqrt{300}-7\sqrt{243}\)

b, \(\sqrt{28}+3\sqrt{63}-6\sqrt{175}-\dfrac{1}{5}\sqrt{252}\)

c,\(5\sqrt{44}-2\sqrt{275}-3\sqrt{176}\)

d, \(2\sqrt{75}-\sqrt{12}+2\sqrt{147}-7\sqrt{103}\)

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