(3-√2)(3+√2)+2√5(√5-1)-(1-√5)²=9+3√2-3√2-2+10-2-(1-2√5+5)=9-2+10-2-1+2√5-5=2√5+9
(√7+2)(√7-2)+2√3(√3-1)-(1-√3)²=7-2√7+2√7-4+6-2√3-(1-2√3+3)=7-4+6-2√3-1+2√3-3=5
(√6-√3)²-(√6-1)(√6-√3)+√3(1-√2)=6-12√3+3-(6-√18-√6+√3)+√3-√6=
6-12√3+3-6+√18+√6-√3+√3-√6=3-12√3+3√2=3(1-4√3+√2)
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