P=$\frac{0,75-0,6+\frac{3}{7}+\frac{3}{13}}{2,75-2,2+\frac{11}{7}+\frac{11}{15}}$
Q=[0,8.7+(0.8) ²].[1,25.7-$\frac{4}{5}$.1,25]+31,64
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