How much is $a^2+2ab+b^{2}a^2\; +\; 2ab\; +\; b^2$ more than $a^2\text{–}2ab+b^2?a^2\; –\; 2ab\; +\; b^2\; ?$

Express $x-\frac{1}{x}x-\; \backslash frac\{1\}\{x\}$ as a rational expression,

Which of the following expressions is a polynomial ?

Which of the following is true ?

Simplify $\frac{a^2-(b-c{)}^2}{(a+c{)}^2-b^2}+\frac{b^2-(a-c{)}^2}{(a+b{)}^2-c^2}+\frac{c^2-(a-b{)}^2}{(b+c{)}^2-a^2}\backslash frac\{a^2-(b-c)^2\}\{(a+c)^2-b^2\}+\backslash frac\{b^2-(a-c)^2\}\{(a+b)^2-c^2\}+\backslash frac\{c^2-(a-b)^2\}\{(b+c)^2-a^2\}$

What should be subtracted from $\left(\frac{2x^2+2x-7}{x^2+x-6}\right)\backslash left(\backslash frac\{2x^2+2x-7\}\{x^2+x-6\}\backslash right)$ to get $\left(\frac{x-2}{x+3}\right)\backslash left(\backslash frac\{x-2\}\{x+3\}\backslash right)$

The lowest form of rational expression $\frac{x^2-4}{xy+2y}\backslash frac\{x^2-4\}\{xy+2y\}$ is

The expression $\frac{1}{1-x}-\frac{1}{1+x}-\frac{x^3}{1-x}+\frac{x^2}{1+x}\backslash frac\{1\}\{1-x\}-\backslash frac\{1\}\{1+x\}-\backslash frac\{x^3\}\{1-x\}+\backslash frac\{x^2\}\{1+x\}$ in lowest term is ……………

Simplify $\frac{81x^4-16x^2+32x-16}{9x^2-4x+4}\backslash frac\{81x^4\; -16x^2\; +32x-16\}\{9x^2-4x+4\}$

What should be added to $\frac{1}{x^2-7x+12}\backslash frac\{1\}\{x^2\; -7x+12\}$ to get $\frac{2}{x^2-6x+8}\backslash frac\{2\}\{x^2\; -6x+8\}$