\[\boxed{\mathbf{33.}}\]
\[2^{x^{2} + 2x - a^{2}} < 4^{x}\]
\[2^{x^{2} + 2x - a^{2}} < \left( 2^{2} \right)^{x}\]
\[x^{2} + 2x - a^{2} < 2x\]
\[x^{2} - a^{2} < 0\]
\[(x - a)(x + a) < 0\]
\[Решение\ неравенства:\]
\[( - a;a).\]
\[( - 1;1):\]
\[a \leq - 1;\]
\[0 < a \leq 1.\]