Degree of an Algebraic Expression

Translate the following statement into a mathematical expression:

Rajeev bought $2$ more apples than Sonu. Sonu has $3$ apples less than Raghu. If Raghu had $n$ number of apples, how many apples did Rajeev and Raghu have?

Find the value of $x^3+3x^{2}y+3x{y}^2+y^3$ if $x=2$ and $y=3$.

Write the degree of the following algebraic expression: $5x^2{y}^{2}z$

Write the degree of the following algebraic expression: $p^2{q}^2+a^2+pq$

Write the degree of the following algebraic expression: $x+y+z-3xyz$

Write the degree of the following algebraic expression: $ab+ba+ca$

Write the degree of the following algebraic expression: $4x^2+5x^2{y}^2+6$

What is the degree of the polynomial $3x^2-1+5x^4-4x^3$?