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

Factorise: $2 x^{2}+7 x+3$

Without actually calculating the cubes,find the value of each of the following: $(28)^{3} + (-15)^{3} + (-13)^{3}$

Find the zero of the polynomial: $p(x) = cx + d$,where $c \neq 0$ and $c, d$ are real numbers.

Verify whether the following are zeroes of the polynomial indicated against them:
$p(x) = 3x^2 - 1, x = -\frac{1}{\sqrt{3}}, \frac{2}{\sqrt{3}}$

Find $p(0)$,$p(1)$,and $p(2)$ for the following polynomial: $p(y) = y^{2} - y + 1$.