\(\text{a},=5\sqrt{3}+4\sqrt{3}-10\sqrt{3}=-\sqrt{3}\\ b,=7\sqrt{2}-6\sqrt{2}+0,5.2\sqrt{2}=\sqrt{2}+\sqrt{2}=2\sqrt{2}\\ c,=3\sqrt{\text{a}}-4\sqrt{\text{a}}+7\sqrt{\text{a}}=6\sqrt{\text{a}}\\ d,=4\sqrt{b}+2.2\sqrt{10b}-3.3\sqrt{10b}=4\sqrt{b}+4\sqrt{10b}-9\sqrt{10b}=4\sqrt{b}-5\sqrt{10b}\)
\(a,\sqrt{75}+\sqrt{48}-\sqrt{300}.\\ =5\sqrt{3}+4\sqrt{3}-10\sqrt{3}.\\ =-\sqrt{3}.\\ b,\sqrt{98}-\sqrt{72}+0,5\sqrt{8}.\\ =7\sqrt{2}-6\sqrt{2}+\sqrt{2}.\\ =2\sqrt{2}.\\ c,\sqrt{9a}-\sqrt{16a}+\sqrt{49a}.\\ =3\sqrt{a}-4\sqrt{a}+7\sqrt{a}.\\ =6\sqrt{a}.\\ d,\sqrt{16b}+2\sqrt{40b}-3\sqrt{90b}.\\ =4\sqrt{b}+4\sqrt{10b}-9\sqrt{10b}.\\ =4\sqrt{b}-5\sqrt{10b}.\)
