a) = [(2+√2)-(2√2-3)]*[(2+√2)+(2√2-3)]=(2+√2-2√2-3)*(2+√2+2√2-3)=(2-√2-3)*(2+3√2-3)=(-1-√2)(-1+3√2)=1+√2-3√2-3*2=1+√2-3√2-6=-5-2√2
b)=3+2*2*√3+4=3+4√3+4=7+4√3
c)=(3-2√3+1)+(12+4√3+1)=(4-2√3)+(13+4√3)=4-2√3+13+4√3=17+2√3
d)=(2√3-1)²-(2√2-1)[(2√2)²-1²]=12-4√3+1-(2√2-1)*(8-1)=13-4√3+14√2+7=20-4√3+14√2