- y=x4+2x2−5y = {x^4} + 2{x^2} - 5.
- y=x3−6x2+xy = {x^3} - 6{x^2} + x.
- y=2x−7x+1y = \frac{{2x - 7}}{{x + 1}}.
- y=−x3−4x+5y = - {x^3} - 4x + 5.