1 = 3√(1 - √3)^2 + √12

$$\begin{gathered} bai 1=3\sqrt{{(1-\sqrt{3})}^2}+\sqrt{12} \\ bai2=\sqrt{{(\sqrt{3}-1)}^2}-\sqrt{{\left(\sqrt{3}+1\right)}^2} \\ bai3=\sqrt{{\left(1+\sqrt{2}\right)}^2}+\sqrt{{\left(1-\sqrt{2}\right)}^2} \\ bai4=\left(3-\frac{2+\sqrt{2}}{\sqrt{2}+1}+3+\frac{2-\sqrt{2}}{\sqrt{2}-1}\right) \\ bai5=\left(\sqrt{7}-1\right)\times \left(\sqrt{7}+1\right) \\ giup edc ko a \end{gathered}$$