Investigation of the tetraquark states <inline-formula><tex-math id="M1">\begin{document}${\boldsymbol Qq\bar{\boldsymbol Q} \bar{\boldsymbol q}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2023-0051_M1.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2023-0051_M1.png"/></alternatives></inline-formula> in the improved chromomagnetic interaction model

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