(8) $$ \frac{2^{2 x}-9}{2^{x}+3} $$

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Calculate or simplify the expression $$ (2^(2x)-9)/(2^x+3) $$.
Simplify the expression by following steps:
- step0: Solution:
  $$\frac{\left(2^{2x}-9\right)}{\left(2^{x}+3\right)}$$
- step1: Remove the parentheses:
  $$\frac{2^{2x}-9}{2^{x}+3}$$
- step2: Rewrite the expression:
  $$\frac{\left(2^{x}\right)^{2}-9}{2^{x}+3}$$
- step3: Calculate:
  $$\frac{\left(2^{x}-3\right)\left(2^{x}+3\right)}{2^{x}+3}$$
- step4: Reduce the fraction:
  $$2^{x}-3$$
The simplified form of the expression $$ \frac{2^{2x}-9}{2^{x}+3} $$ is $$ 2^{x}-3 $$.
The simplified form is $$ 2^{x} - 3 $$.

(8)

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