-(3+x²)+5(1-x²)-3(1-x)(1+x)=-3-x²+5-5x²-3(1-x²)=-3-x²+5-5x²-3+3x²=x²-1podstawiajac za x=√2
(√2)²-1=2-1=1
(2x-1)²-(2x+1)(2x-1)-(2x+1)²=2x²-2x+1-(4x²-1)-(4x²+2x+1)=2x²-2x+1-4x²+1-4x²-2x-1=
-6x²-4x+1
3*(1/27)³)²
.................=
9
(1/9)⁶podzielic przez 9
5-3*(2/5)⁰)⁻²=3*(1)⁻²=3*1/2=3/2