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Pyramid 1441
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$$U_{1441}(x, y) = \frac{\left(y + 1\right)^{2}}{\left(- x \left(y + 1\right) + 1\right)^{3}}$$
Pyramid 1442
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$$U_{1442}(x, y) = \frac{\left(y + 1\right)^{3}}{\left(- x \left(y + 1\right) + 1\right)^{3}}$$
Pyramid 1443
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$$U_{1443}(x, y) = \frac{y + 1}{\left(- x \left(y + 1\right)^{2} + 1\right)^{3}}$$
Pyramid 1444
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$$U_{1444}(x, y) = \frac{\left(y + 1\right)^{3}}{\left(- x \left(y + 1\right)^{2} + 1\right)^{3}}$$
Pyramid 1445
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$$U_{1445}(x, y) = \frac{y + 1}{\left(- x \left(y + 1\right)^{3} + 1\right)^{3}}$$
Pyramid 1446
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$$U_{1446}(x, y) = \frac{\left(y + 1\right)^{2}}{\left(- x \left(y + 1\right)^{3} + 1\right)^{3}}$$
Pyramid 1447
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$$U_{1447}(x, y) = \frac{1}{\left(1 - y\right)^{2} \left(- \frac{x}{\left(1 - y\right)^{3}} + 1\right)}$$
Pyramid 1448
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$$U_{1448}(x, y) = \frac{1}{\left(1 - y\right) \left(- \frac{x}{\left(1 - y\right)^{2}} + 1\right)^{2}}$$
Pyramid 1449
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$$U_{1449}(x, y) = \frac{1}{\left(1 - y\right) \left(- \frac{x}{\left(1 - y\right)^{3}} + 1\right)^{2}}$$
Pyramid 1450
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$$U_{1450}(x, y) = \frac{1}{\left(1 - y\right)^{3} \left(- \frac{x}{\left(1 - y\right)^{2}} + 1\right)^{2}}$$
Pyramid 1451
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$$U_{1451}(x, y) = \frac{1}{\left(1 - y\right)^{2} \left(- \frac{x}{\left(1 - y\right)^{3}} + 1\right)^{2}}$$
Pyramid 1452
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$$U_{1452}(x, y) = \frac{1 - \sqrt{- \frac{4 x}{\left(1 - y\right)^{2}} + 1}}{2 x \left(1 - y\right)}$$
Pyramid 1453
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$$U_{1453}(x, y) = \frac{1 - \sqrt{- \frac{4 x}{\left(1 - y\right)^{3}} + 1}}{2 x \left(1 - y\right)}$$
Pyramid 1454
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$$U_{1454}(x, y) = \frac{- \frac{2 x}{1 - y} - \sqrt{- \frac{4 x}{1 - y} + 1} + 1}{2 x^{2}}$$
Pyramid 1455
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$$U_{1455}(x, y) = \frac{- \frac{2 x}{1 - y} - \sqrt{- \frac{4 x}{1 - y} + 1} + 1}{2 x^{2} \left(1 - y\right)}$$
Pyramid 1456
Preview
$$U_{1456}(x, y) = \frac{\left(1 - y\right)^{2} \left(- \frac{2 x}{\left(1 - y\right)^{2}} - \sqrt{- \frac{4 x}{\left(1 - y\right)^{2}} + 1} + 1\right)}{2 x^{2}}$$
Pyramid 1457
Preview
$$U_{1457}(x, y) = \frac{\left(1 - y\right) \left(- \frac{2 x}{\left(1 - y\right)^{2}} - \sqrt{- \frac{4 x}{\left(1 - y\right)^{2}} + 1} + 1\right)}{2 x^{2}}$$
Pyramid 1458
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$$U_{1458}(x, y) = \frac{\left(1 - y\right)^{5} \left(- \frac{2 x}{\left(1 - y\right)^{3}} - \sqrt{- \frac{4 x}{\left(1 - y\right)^{3}} + 1} + 1\right)}{2 x^{2}}$$
Pyramid 1459
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$$U_{1459}(x, y) = \frac{\left(1 - y\right)^{4} \left(- \frac{2 x}{\left(1 - y\right)^{3}} - \sqrt{- \frac{4 x}{\left(1 - y\right)^{3}} + 1} + 1\right)}{2 x^{2}}$$
Pyramid 1460
Preview
$$U_{1460}(x, y) = \frac{\left(1 - y\right)^{3} \left(- \frac{2 x}{\left(1 - y\right)^{3}} - \sqrt{- \frac{4 x}{\left(1 - y\right)^{3}} + 1} + 1\right)}{2 x^{2}}$$
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