Решите пожалуйста 334-336 чётные примеры

Решите задачу:

$334) 2) 0,8\sqrt{54,76}+9/10*\sqrt{2,25}-\sqrt{79,21}=0,8*7,4+0,9*1,5=7,27 4) 48*\sqrt{49/256}-26/3* \sqrt{900/169}+62* \sqrt{144/961}= 48*7/16-26/3*30/13+62*12/31=336/16-0,2+744/31=21-0,2+24=44,8$ $335) 2) (\sqrt{43}-5)^{2}+10(\sqrt{43}-0,2) =(\sqrt{43})^{2}-10\sqrt{43}+25+10\sqrt{43}-2=43+25-2=70 4) (\sqrt{2}-\sqrt{15})^{2}+(\sqrt{6}+\sqrt{5})^{2} =(\sqrt{2})^{2}-2\sqrt{30}+(\sqrt{15})^{2}+(\sqrt{6})^{2}+2\sqrt{30}+(\sqrt{5})^{2} =2+15+6+5=28$ $336) 2) \sqrt{6}(0,5\sqrt{24}-8\sqrt{11})-4\sqrt{11}(\sqrt{99}-2\sqrt{6}) =0,5\sqrt{144}-8\sqrt{66}-4\sqrt{1089}+8\sqrt{66}=0,5*12-4*33=-126$ $4) (17- \sqrt{21} )^{2}-5 \sqrt{3}(4 \sqrt{27} -6,8 \sqrt{7}) 289-34\sqrt{21}+(\sqrt{21})^{2}-20 \sqrt{81} +34\sqrt{21}= =289+21-20*9=130$