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Please need a fast reply​

Please need a fast reply​-example-1
User Pollaris
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\sf \bf {\boxed {\mathbb {C. \: 21n + 7}}}


\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}


7 \: ( \: 3n + 1 \: )


\: 21n + 7


\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}

User TheWaveLad
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