Solve for A_m (complex solution)
A_{m}=\sqrt[3]{210}e^{\frac{2\pi i}{3}}\approx -2.971960976+5.147587409i
A_{m}=\sqrt[3]{210}\approx 5.943921953
A_{m}=\sqrt[3]{210}e^{\frac{4\pi i}{3}}\approx -2.971960976-5.147587409i
Solve for A_m
A_{m}=\sqrt[3]{210}\approx 5.943921953
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