Question

suma y resta de polinomios
$( \times ^{4} - 9 \times ^{3} + 6 { \times }^{2} - 8 \times + 1) - ( - 8 { \times }^{3} - 9 \times {}^{2} - \times + 12)=$
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Answer 1

Hazlo tú, da flojera, :Vvvvvvv