How do you find the domain and range of  f(x) = 7x^5 - 3x^2 - 2?

Both the domain and range of this function is all real numbers, or $\left(- \infty , \infty\right)$ (interval notation).
Both the domain and range of this function is all real numbers, or $\left(- \infty , \infty\right)$ (interval notation).