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pfvrr respondam
7x{3 +[5x(82x2)]x3} =


Resposta :

[tex]7\cdot \:3+\left[5\cdot\left(82\cdot \:2\right)\right]\cdot 3\\7\cdot \:3+820\cdot \:3\\21+820\cdot \:3\\21+2460\\2481\\\\\\[/tex]