Evaluate the following using suitable identities

$(995)^{3}$

Check whether the polynomial

$p(x)=x^{3}+9 x^{2}+26 x+24$ is a multiple of $x+2$ or not.

Expand

$(x+3)(x+8)$

Determine the degree of each of the following polynomials:

$x^{3}-9 x+3 x^{5}$

If $49 x^{2}-b=\left(7 x+\frac{1}{2}\right)\left(7 x-\frac{1}{2}\right),$ then the value of $b$ is