\[\left( 9x^{2} - 4 \right)\left( 16 - x^{2} \right)\left( 2x^{2} + 3 \right) > 0\]
\[2x^{2} + 3 > 0;\]
\[- 9\left( x^{2} - \frac{4}{9} \right)\left( x^{2} - 16 \right) > 0\]
\[\left( x + \frac{2}{3} \right)\left( x - \frac{2}{3} \right)(x + 4)(x - 4) < 0\]
\[(x + 4)\left( x + \frac{2}{3} \right)\left( x - \frac{2}{3} \right)(x - 4) < 0\]
\[- 4 < x < - \frac{2}{3};\ \ \frac{2}{3} < x < 4.\]