1. \(805t^4 - 513t^3 + 401t^2 - 37\)
2. \(10.5z^2 + 8.4z + 8.7\)
3. \(5u^{20} + 7u - 9\)
4. \(\frac{3}{8}x^{20} - \frac{5}{6}x^{15} + \frac{4}{5}x - x - \frac{1}{12}\)
5. \(\frac{5}{3}y^{16} - \frac{1}{4}y^5 + \frac{3}{5}y - \frac{13}{15}\)
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