Решите плз нету времени не аб с а решить надо

Решите задачу:

$\frac{(6-4,5)}{0.003} =\frac{1,5}{0.003} =500$

$\frac{\frac{5}{6}-\frac{7}{3}\cdot0.2}{1\frac{5}{6}}=\frac{\frac{5}{6}-\frac{1.4}{3}}{\frac{11}{6}}=\frac{\frac{5}{6}-\frac{2.8}{6}}{\frac{11}{6}}=\frac{\frac{2.2}{6}}{\frac{11}{6}}=\frac{2.2}{11}=0.2$

$10\sqrt{3}-\sqrt{48}-\sqrt{75}=10\sqrt{3}-4\sqrt{3}-5\sqrt{3}=\sqrt{3}$

$(81^\frac{1}{4}-64^\frac{1}{6}):121^\frac{1}{2}=(\sqrt[4]{81}-\sqrt[6]{64}):\sqrt{121}=(3-2):11=\frac{1}{11}$

$5,6a+8.4a+186.4=14a+186.4=14\cdot3.5+186.4=49+186.4=235.4$