Упростите выражения (63–73): 1) 2√a+3√a+5√b; 2) √16a+3√a+√36a-√9a; 3)…

Упростите выражения (63–73):

1. $2\sqrt{a}+3\sqrt{a}+5\sqrt{b}$;
2. $\sqrt{16a}+3\sqrt{a}+\sqrt{36a}-\sqrt{9a}$;
3. $4\sqrt{x}+\sqrt{50y}-\sqrt{25x}-5\sqrt{18y}$;
4. $3\sqrt{4x}-\sqrt{54y}+4\sqrt{49x}$.

1. $\sqrt{81b}+\sqrt{2ab}-\sqrt{36b}$;
2. $\sqrt{25a}-\sqrt{0.01a}+\sqrt{1.44a}$;
3. $2\sqrt{16x}+3\sqrt{12y}-\sqrt{121x}-4\sqrt{147y}$;
4. $\sqrt{5x}-4\sqrt{20x}+7\sqrt{49y}-3\sqrt{169y}$.

1. $(\sqrt{11}+\sqrt{12})\cdot\sqrt{3}$;
2. $(\sqrt{5}+\sqrt{7})\cdot\sqrt{20}$;
3. $\sqrt{12}-(\sqrt{5}+\sqrt{3})\cdot\sqrt{4}$;
4. $(\sqrt{12}-\sqrt{9})\cdot\sqrt{20}+\sqrt{160}$.

1. $(2+\sqrt{3})\cdot(\sqrt{3}-2)$;
2. $(3\sqrt{2}+1)\cdot(1-3\sqrt{2})$;
3. $(\sqrt{3}+4)\cdot(4-\sqrt{3})$;
4. $(5\sqrt{2}+7)\cdot(7-5\sqrt{2})$.

1. $(2\sqrt{6}-\sqrt{3})\cdot(\sqrt{3}+2\sqrt{6})$;
2. $(12-\sqrt{7})\cdot(\sqrt{7}+12)$;
3. $(7\sqrt{a}+2\sqrt{b})(2\sqrt{b}-7\sqrt{a})$;
4. $(\sqrt{10}-2\sqrt{3})(2\sqrt{3}+\sqrt{10})$.

1. $(a-2\sqrt{b})\cdot(2\sqrt{b}+a)+2\sqrt{b}$;
2. $\sqrt{12}+(5\sqrt{11}+\sqrt{7})\cdot(\sqrt{7}-5\sqrt{11})$;
3. $(8\sqrt{3}-3\sqrt{5})\cdot(3\sqrt{5}+8\sqrt{3})+24\sqrt{15}$;
4. $2x-(4\sqrt{x}+7\sqrt{y})\cdot(7\sqrt{y}-4\sqrt{x})$.

1. $(\sqrt{2}+\sqrt{3})^2$;
2. $(\sqrt{7}+\sqrt{9})^2$;
3. $(\sqrt{6}-\sqrt{8})^2$;
4. $(\sqrt{11}-\sqrt{12})^2$.

1. $(2\sqrt{3}-10)^2$;
2. $(3\sqrt{3}+8)^2$;
3. $(9-\sqrt{3})^2$;
4. $(\sqrt{5}+3\sqrt{7})^2$.

1. $(\sqrt{7}+\sqrt{5})^2-4\sqrt{35}$;
2. $(\sqrt{13}-2\sqrt{3})^2+4\sqrt{39}$;
3. $5\sqrt{64}-(\sqrt{8}+2\sqrt{8})^2$;
4. $7\sqrt{255}+(\sqrt{15}-\sqrt{17})^2$.