Add the following algebraic expression.

$10x^{2}y, -5y{x}^2 \mathrm{and} 3y{x}^2$ 

Add the following algebraic expression.

$a^2-b^2+a^{2}b-a{b}^2, b^2-a{b}^2-a^2+a^{2}b \mathrm{and} a^{2}b-b^2-a^2-a{b}^2$ 

Add the following algebraic expression.

$2x^2+3y^2+4z^2, 8y^2+9z^2+6x^2 \mathrm{and} -15z^2-13y^2-11x^2$ 

Add the following algebraic expression.

$3x^2-5xy-1+8y^2, -2xy+3y^2-5+10x^2 \mathrm{and} 8-xy+x^2-y^2$ 

Add the following algebraic expression.

$2.4x^2+15x-10x^3-0.5, 10.1x-5x^2+6x^3-1 \mathrm{and} 5.5-6.1x+3.6x^2+4x^3$ 

Add the following algebraic expression.

$8x-10y, 16y-5x, -2x+5y, -7x+10y \mathrm{and} 15x+10y$ 

Add the following algebraic expression.

$l^{2}m{p}^2+5lm{p}^2, 10ml{p}^2-7p^2{l}^{2}m \mathrm{and} 10m{l}^2{p}^2-9l^{2}mp$ 

Add the following algebraic expression.

$15m^{2}n+m^2-n^{2}p \mathrm{and} 10m^2+5n^{2}p+2m^{2}n$ 

Subtract the first expression from the second.

$10p^3{q}^{2}r, 16p^3{q}^{2}r$