1. thực hiện phép tính
a, (\(\sqrt{12}.\sqrt{75}+\sqrt{27}\)). \(\sqrt{3}\)
b, (12\(\sqrt{50}\)-8\(\sqrt{200}\)+7\(\sqrt{450}\)) : \(\sqrt{10}\)
c, (7\(\sqrt{48}\)+9\(\sqrt{27}\)-2\(\sqrt{12}\)):\(\sqrt{15}\)
d,(\(\sqrt{32}\)-\(\sqrt{50}+\sqrt{8}\)):\(\sqrt{2}\)