Every algebraic expression is a polynomial. Is this statement true? Why?

If the product of $3a{b}^2 \text{and} -2a^2{b}^3$ is $A{a}^p{b}^q$, then the value of $A+p+q$ is

If the product of $4xy, 5y^{2}x, \left(-x^2\right)$ is $a{x}^b{y}^c$, find $a+b+c$.

Find the product of:

$2m, -5n, -3p$

Multiply

$\left(5x^2+7x-3\right)$ by $4x^2$

Multiply

$(10x-7y+5z)$ by $6xyz$

Multiply:

$\left(ab+3bc-5ca\right)$ by $3a^{2}bc$

Multiply:

$\left(4m^2-3m+7\right)$ by $-5m^3$