If$p\left(x\right)$ and $q\left(x\right)$are two expressions of degree $3$, then the highest possible degree of$p\left(x\right)+ q\left(x\right)$ is

If $6^2\times 6^m=6^5$, then find the value of 'm'.

Find the unit digit of ${124}^{128}\times {126}^{124}$.

Find the unit digit of the numeric expression ${16}^{23}+{71}^{48}+{59}^{61}$.

Find the value of $\frac{(-1{)}^6\times (-1{)}^7\times (-1{)}^8}{(-1{)}^3\times (-1{)}^5}$.

Identify the degree of the expression, $2a^{3}bc+3a^{3}b+3a^{3}c-2a^2{b}^2{c}^2$.

If $p=-2, q=1$ and $r=3$, then find the value of $3p^2{q}^{2}r$.