f(x)=x2f(x)=x^{2}f(x)=x2
f(x)=x2+4f(x)=x^{2}+4f(x)=x2+4
f(x)=x3f(x)=x^{3}f(x)=x3
f(x)=x2−1f(x)=x^{2}-1f(x)=x2−1
