1,Rút gọn biểu thức sau
a,(\(\sqrt{3}-\sqrt{2}+1\) ).(\(\sqrt{3}-1\) )
b,(0,2\(\sqrt{\left(-10\right)^2.3}\) +2\(\sqrt{\left(\sqrt{3}-\sqrt{5}\right)^2}\)
c,(\(\sqrt{28}-2\sqrt{14}+\sqrt{7}\) ).\(\sqrt{7}+7\sqrt{8}\)
d,(\(15\sqrt{50}+5\sqrt{200}-3\sqrt{450}\) ):\(\sqrt{10}\)