Expression with Variables

If $a=2, b=3$ and $c=4$ then the value of $a^3+b^3+c^3+3abc$ is _____ .

Omar helps his mother $1 \mathrm{hour}$ more than his sister does. If Omar helps his mother for $A \mathrm{hours}$ then write the value of $A$. (Take the variable as $x$)

Write the expression: Area of the rectangle with length $k$ units and breadth $n$ units is $P$ square units then find $P.$

Choose a letter $x, y, z, p$ etc...., wherever necessary, for the unknown (variable) and write the corresponding expressions:

Write algebraic expressions for $10$ divided by $q$ in $\frac{p}{q}$ form.

Write the following using numbers, literals and basic operation: The quotient of $x$ by $8$ is multiplied by $y$.

Write the following using numbers, literals and signs of basic operation.

$4$ times of $\mathrm{x}$ taken away from one-third of $6$ times $\mathrm{y}$.