Like and Unlike Terms

The terms whose literal factors are same are called _____ terms.

In the video, we have seen that the terms whose variables with their exponents are not same are called 

Identify the like terms in the expression $8x^{2}y+4x{y}^2-7x^{2}y-3+3x{y}^2$

Simplify:

$4x-10y+8x-3y$

Simplify;

$-\left(49-a^2\right)-5a^2$

Simplify;

$-\left\{-2b-\left(3b+8c\right)\right\}$

Simplify;

$\left\{6x^2-\left(2x^2-y^2\right)-2y^2\right\}$

Simplify;

$3x-\left[x-\left(4x+3y\right)+5y\right]$

Simplify:

$8-\left(3y+4\right)$

Simplify;

$4t+\left[3-\left(2t-4\right)\right]$

Simplify;

$\left[3c-\left(2c+5d\right)-d\right]$

Simplify:

$2y-\left(3y+2\right)-6+\left(3y-8\right)$

Simplify:

$5a-\left(4a-3x\right)$

Simplify:

$6x+\left(-7x-2y\right)$

Simplify:

$11+\left(-7a+4\right)$

Simplify:

$5x+\left(3x-7\right)$

What values of $a$ and $b$ make the given statement true?

$\left(a{y}^2+3xy-9x^2\right)-\left(-4y^2+8xy+b{x}^2\right)=10y^2-5xy-10x^2$

Subtract the sum of  $9b^2-3c^2$ and $2b^2+bc-2c^2$ from the sum of  $2b^2-2bc-c^2$ and $c^2+2bc-b^2$.

From the sum of $x^2-2xy+y^2$ and $x^2+2xy+y^2$ subtract $x^2-4xy+4y^2$.

How much is $0$ greater than $-a^2-ab+7b^2?$