Explicație pas cu pas:
2018^(2)-2018-2017=
2018*(2018-1)-2017=
2018*2017-2017=
2017(2018-1)=
2017^(2)
2.
2+2^1+2^2+2^3+2^4+2^5=
2(1+1+2+2^2+2^3+2^4)=
2(2^2+2^2+2^3+2^4)=
2(2^3+2^3+2^4)=
2(2^4+2^4)=
2*2^5=2^6
3. 10^2=(2*5)^2
13^2=(4+9)^2
