[tex]\sqrt{32} - \sqrt{50}+ \sqrt{8} - \sqrt{98}+ \sqrt{242}= \\ \\ =\sqrt{16 \cdot 2}- \sqrt{25 \cdot 2} + \sqrt{4 \cdot 2 } - \sqrt{49 \cdot 2}+ \sqrt{121 \cdot 2}= \\ \\ =4 \sqrt{2}-5 \sqrt{2}+2 \sqrt{2}-7 \sqrt{2}+11 \sqrt{2}= \\ \\ =5 \sqrt{2}/ [/tex]
