Write the appropriate polynomials in the boxes.

Use the given letters to write the answer.

There are ‘$a$’ trees in the village. If the number of trees increases every year by ‘$b$’, then how many trees will there be after ‘$x$’ years?

Use the given letters to write the answer.

For the parade there are$y$students in each row and $x$ such row is formed. Then, how many students are there for the parade in all?

Use the given letters to write the answer.

The tens and units place of a two-digit number is $m$ and $n$ respectively. Write the polynomial which represents the two-digit number.

Add the given polynomials.

$x^3-2x^2-9 ; 5x^3+2x+9$

Add the given polynomials:

$-7m^4+5m^3+\sqrt{2} ; 5m^4-3m^3+2m^2+3m-6$

Add the given polynomials:

$2y^2+7y+5; 3y+9 ; 3y^2-4y-3$ 

Subtract the second polynomial from the first.

$x^2-9x+\sqrt{3} ; -19x+\sqrt{3}+7x^2$

Subtract the second polynomial from the first:

$2a{b}^2+3a^{2}b-4ab; 3ab-8a{b}^2+2a^{2}b$