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\left\{\left.\frac{1}{3} \mathrm{x}^{3}\right|_{1} ^{2}=\frac{7}{3}\right\} \cdot\left\{\left.\frac{1}{2} \mathrm{x}^{2}\right|_{1} ^{2}=\frac{3}{2}\right\}=\frac{7}{2} \neq