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[(2-8)/(2-5)]+[(4-7)x(3-10)]

\(\begin{array}{|rcll|} \hline && \left(\frac{2-8}{2-5} \right) + (4-7)\times (3-10) \\\\ &=& \left(\frac{-6}{-3} \right) + (-3)\times (-7) \\\\ &=& \left(\frac{6}{3} \right) + 3\times 7 \\\\ &=& 2 + 21 \\\\ &=& 23 \\ \hline \end{array}\)