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[tex]( - 1.14 - 0.96) \div ( - 4.2) + 1.8 \times ( - 0.3) \\ - 2.1 \div ( - \frac{21}{5} ) - 0.54 \\ - \frac{21}{10} \div ( - \frac{21}{5} ) - \frac{27}{50} \\ \frac{21}{10} \times \frac{5}{21} - \frac{27}{50} \\ \frac{1}{2} - \frac{27}{50} \\ - \frac{1}{25 } = -0.04[/tex]