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(a+b)²=a²+2ab+b²
-(8-12√2-9)=-8+12√2+9=1+12√2
-(45+12√5+4)=-45-12√5-4=-41-12√5
-(24+4√2-3√2-1)=-24-4√2+3√2+1=-23-√2
-(10√11+100-11-10√11)=-(89)=-89
-(3-9+3√3-1)=-(-7+3√3)=7-3√3