0} \atop {3x-2\geq 0}} \right.\; \left \{ {{(x-3)(x+3)>0} \atop {3x\geq 2}} \right.\; \left \{ {{x\in (-\infty ,-3)\cup (3,+\infty )} \atop {x\geq \frac{2}{3}}} \right. \; \; \to \; x\in (3,+\infty )" alt="3)\; \; \left \{ {{x^2-9>0} \atop {3x-2\geq 0}} \right.\; \left \{ {{(x-3)(x+3)>0} \atop {3x\geq 2}} \right.\; \left \{ {{x\in (-\infty ,-3)\cup (3,+\infty )} \atop {x\geq \frac{2}{3}}} \right. \; \; \to \; x\in (3,+\infty )" align="absmiddle" class="latex-formula">