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(-1\frac{1}{3}*1\frac{1}{3}):[(-1\frac{1}{5})+\frac{8}{15}]=(-\frac{4}{3}*\frac{4}{3}):[(-\frac{6}{5})+\frac{8}{15}]-\frac{16}{9}:(-\frac{18}{15}+\frac{8}{15})=
-\frac{16}{9}:(-\frac{10}{15})\frac{16}{9}:\frac{2}{3}=\frac{16}{9}*\frac{3}{2}=\frac{48}{18}=2\frac{12}{18}=2\frac{2}{3}
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x-(-1\frac{1}{3}=-7\frac{2}{7}
x+1\frac{1}{3}=-7\frac{2}{7}
x=-7\frac{2}{7}-1\frac{2}{3}
x=-7\frac{6}{21}-1\frac{14}{21}
x=-8\frac{20}{21}
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(-3\frac{3}{4}+1\frac{1}{4}):2=-2\frac{2}{4}:2=-1\frac{1}{4}