m+n+m^2+n^2;
a-b-a^2+b^2;
x^5-x^3+x^2-1;
m^2+m^2-m-1;
x^2-y^2-x-y;
m^4-m^3+m-1;

veraeliseeva718    3   26.01.2022 12:27    1