50 БАЛЛОВ! Помогите с этими неравенствами. Что-что, но это я без вашей помощи не сделаю! ...

$0.9^{2-x}\ \textless \ 0.81\\0.9^{2-x}\ \textless \ 0.9^2}\\0.9^{-x}\ \textless \ 1\\-x\ \textgreater \ 0\\x\ \textless \ 0$

$8*2^{x^2-3x}\ \textless \ 0.5^{-1}\\2^{x^2-3x+3}\ \textless \ 2\\x^2-3x+3\ \textless \ 1\\(x-2)(x-1)\ \textless \ 0\\x\in(1;2)$

$6^{x+5\over x^2-9}\ \textgreater \ 1\\{x+5\over (x-3)(x+3)}\ \textgreater \ 0\\x\in(-\infty;-5)\cup(-3;3)$

$2^{x+2}-2^{x+3}-2^{x+4}\ \textless \ 5^{x+1}-5^{x+2}\\-5*2^{x+2}\ \textless \ -4*5^{x+1}\\2^x\ \textgreater \ 5^x\\(0.4)^x\ \textgreater \ 1\\x\ \textless \ 0$

0\\4t^2-7t-2\ \textless \ 0\\(t-2)(4t+1)\ \textless \ 0\\t\in(0;2)\\x\in(-\infty;1)" alt="4*4^x\ \textless \ 7*2^x+2\\2^x=t,t>0\\4t^2-7t-2\ \textless \ 0\\(t-2)(4t+1)\ \textless \ 0\\t\in(0;2)\\x\in(-\infty;1)" align="absmiddle" class="latex-formula">

$6^{\sqrt {x-2}}-2\ \textless \ 24*({1\over6})^{\sqrt{x-2}}\\6^{\sqrt{x-2}}=t, t\ \textgreater \ 0\\t-2\ \textless \ {24\over t}\\{t^2-2t-24\over t}\ \textless \ 0\\{(t-6)(t+4)\over t}\ \textless \ 0\\t\in(0;6)\\\sqrt{x-2}\in(-\infty;1), x\geq2\\x\in[2;3)$