Упростите выражение \(\LARGE{\mathbf{\frac{\frac{3x+4}{9x^2+12x+16}+\frac{3x-4}{9x^2-12x+16}}{\frac{3x+4}{9x^2+12x+16}-\frac{3x-4}{9x^2-12x+16}}}}\) .

• \(\Large{\frac{27x^3}{64}}\)
• \(\normalsize{27x^3}\)
• \(\Large{\frac{27x^2}{64}}\)
• \(\Large{\frac{27}{64}}\)
• \(\Large{\frac{27x^4}{64x^2}}\)
• \(\large{x^3+\frac{27x^2}{64}}\)
• \(\large{x^3-\frac{27x^3}{64}}\)
• \(\large{x^2-\frac{27x^3}{64}}\)
• \(\large{x^2+\frac{27x^3}{64}}\)
• \(x^3+64\)
• \(\large{x^2-\frac{37x}{64}}\)
• \(\large{x^2-\frac{37}{64x^2}}\)
• \(\large{\frac{37}{64x^2}-x^4}\)