0}}\right.\implies\left \{{{(x-\sqrt{7}})(x+\sqrt{7})<0\atop \stackrel{\textnormal{znak povtoritsya}}{{(x+1)^{2}>0}}} \right.\implies\\\\\\\\\implies x \in (-\sqrt{7};1)\cup (1; \sqrt{7})" alt="\bf\displaystyle |x^{2}-4| < 3\\\\\left\{{{x^{2}-4<3}\atop{-(x^{2}-4)<3}}\right.\implies \left\{{{x^{2}-7<0}\atop{x^{2}+1>0}}\right.\implies\left \{{{(x-\sqrt{7}})(x+\sqrt{7})<0\atop \stackrel{\textnormal{znak povtoritsya}}{{(x+1)^{2}>0}}} \right.\implies\\\\\\\\\implies x \in (-\sqrt{7};1)\cup (1; \sqrt{7})" align="absmiddle" class="latex-formula">