Classify the following as a constant,linear,quadratic,or cubic polynomial:
$5t - \sqrt{7}$

Which of the following expressions are polynomials in one variable and which are not? State the reason for your answer. If the given expression is a polynomial,state whether it is a polynomial in one variable or not.
$x^{2} + x - 3 + \frac{4}{x}$

Classify the following as a constant,linear,quadratic,or cubic polynomial:
$3x^3$

Classify the following as a constant,linear,quadratic,or cubic polynomial:
$1+x+x^{2}$

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer: $x^{10} + y^{3} + t^{50}$

Find the degree of the polynomial given: $x^{5}-x^{4}+3$