Which of the following is a Numerical Expression?

Which of the following is Algebraic Expression?

The degree of a monomial $\frac{-5}{2}\backslash frac\{-5\}\{2\}$ $x{y}^{2}xy^2$ $z^{3}z^3$ is?

The degree of a monomial $\frac{-15}{19}\backslash frac\{-15\}\{19\}$ $l^3{m}^{4}nl^3m^4n$ is …

The degree of an algebraic expression $a{x}^3+b{x}^2+cx+d{x}^{11}+e{x}^{9}ax^3+bx^2+cx+dx^\{11\}+ex^9$ is …

The degree of an algebraic expression $lmn+l^{2}m-l{n}^2-m^{2}nlmn+l^2m-ln^2-m^2n$ is …

Subtract 11p from 2p is ……

If x = – 1 what is the value of $x^2-1x^2-1$ ?

What is the value of $m^n-n^{m}m^n-n^m$ if m = 3, n = 2?

What is the value of xy + 3y – 9 when x = 1, y = 2 is …