[tex]1) 8\sqrt{20}\frac{1}{4} -\frac{\sqrt{0,36} }{\sqrt{0,01} }[/tex]
[tex]2) \sqrt{0,64*49} - \sqrt{3x^{4}*2x^{6} }[/tex]
[tex]3) \sqrt{18} *\sqrt{2} -\sqrt{20}* \sqrt{5}[/tex]