In the polynomial $5x^{3} - 3x^{2} + 11x - 4$,the coefficient of $x^{2}$ is......

Write the coefficient of $x^{2}$ in each of the following:
$(i)$ $(x-1)(3 x-4)$
$(ii)$ $(2 x-5)(2 x^{2}-3 x+1)$

Find the value of the polynomial $p(x) = 5x^2 - 3x + 7$ at $x = 1$.

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.
$x^{2} + x - 3 + \frac{4}{x}$

Write the degree of the following polynomial: $ax^3 + bx^2 + cx + d$.

Classify the following as linear,quadratic,and cubic polynomials:
$(i)$ $1+x$
$(ii)$ $3t$
$(iii)$ $r^{2}$
$(iv)$ $7x^{3}$