Pyramid 881
Preview $$U_{881}(x, y) = \frac{\left(2 - 2 \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x \left(y + 1\right)}}{2} \right)}}{3} \right)}\right) \left(y + 1\right)^{2}}{3 x}$$
Pyramid 882
Preview $$U_{882}(x, y) = \frac{\left(y + 1\right)^{3}}{\left(- \frac{x}{\left(y + 1\right)^{2}} + 1\right)^{2}}$$
Pyramid 883
Preview $$U_{883}(x, y) = \frac{2 x + \left(y + 1\right)^{5} + \left(y + 1\right)^{2} \sqrt{4 x + y^{6} + 6 y^{5} + 15 y^{4} + 20 y^{3} + 15 y^{2} + y \left(4 x + 6\right) + 1}}{2 \left(y + 1\right)^{2}}$$
Pyramid 884
Preview $$U_{884}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x} \operatorname{abs}{\left(y + 1 \right)}}{2} \right)}}{3} \right)}}{3 x \left(y + 1\right)}$$
Pyramid 885
Preview $$U_{885}(x, y) = \frac{y + 1}{\left(- x \left(y + 1\right) + 1\right)^{2}}$$
Pyramid 886
Preview $$U_{886}(x, y) = x \left(y + 1\right) + \frac{y}{2} + \frac{\sqrt{4 x + 1} \left(y + 1\right)}{2} + \frac{1}{2}$$
Pyramid 887
Preview $$U_{887}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x} \operatorname{abs}{\left(y + 1 \right)}}{2} \right)}}{3} \right)}}{3 x}$$
Pyramid 888
Preview $$U_{888}(x, y) = \frac{\left(1 - \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x} \operatorname{abs}{\left(y + 1 \right)}}{2} \right)}}{3} \right)}\right) \left(2 y + 2\right)}{3 x}$$
Pyramid 889
Preview $$U_{889}(x, y) = \frac{\left(y + 1\right)^{3}}{\left(- \frac{x}{y + 1} + 1\right)^{2}}$$
Pyramid 890
Preview $$U_{890}(x, y) = \frac{2 x + \sqrt{4 x + \left(y + 1\right)^{4}} \left(y + 1\right)^{2} + \left(y + 1\right)^{4}}{2 y + 2}$$
Pyramid 891
Preview $$U_{891}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \operatorname{asin}{\left(\frac{3 \sqrt{3} \sqrt{\frac{x}{1 - y}}}{2} \right)}}{3} \right)}}{3 x}$$
Pyramid 892
Preview $$U_{892}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \operatorname{asin}{\left(\frac{3 \sqrt{3} \sqrt{\frac{x}{1 - y}}}{2} \right)}}{3} \right)}}{3 x \left(1 - y\right)}$$
Pyramid 893
Preview $$U_{893}(x, y) = \frac{1}{\left(1 - y\right)^{2} \left(- x \left(1 - y\right) + 1\right)^{2}}$$
Pyramid 894
Preview $$U_{894}(x, y) = \frac{\left(1 - y\right) \left(2 x + \frac{\sqrt{\frac{4 x}{1 - y} + \frac{1}{\left(1 - y\right)^{4}}}}{1 - y} + \frac{1}{\left(1 - y\right)^{3}}\right)}{2}$$
Pyramid 895
Preview $$U_{895}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \operatorname{asin}{\left(\frac{3 \sqrt{3} \sqrt{\frac{x}{1 - y}}}{2} \right)}}{3} \right)}}{3 x \left(1 - y\right)^{2}}$$
Pyramid 896
Preview $$U_{896}(x, y) = \frac{1}{\left(1 - y\right)^{3} \left(- x \left(1 - y\right)^{2} + 1\right)^{2}}$$
Pyramid 897
Preview $$U_{897}(x, y) = x \left(1 - y\right)^{2} + \frac{\sqrt{\frac{4 x}{1 - y} + \frac{1}{\left(1 - y\right)^{6}}}}{2} + \frac{1}{2 \left(1 - y\right)^{3}}$$
Pyramid 898
Preview $$U_{898}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x}}{2 \operatorname{abs}{\left(y - 1 \right)}} \right)}}{3} \right)}}{3 x}$$
Pyramid 899
Preview $$U_{899}(x, y) = \frac{\left(1 - y\right) \left(2 - 2 \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x}}{2 \operatorname{abs}{\left(y - 1 \right)}} \right)}}{3} \right)}\right)}{3 x}$$
Pyramid 900
Preview $$U_{900}(x, y) = \frac{2 - 2 \cos{\left(\frac{2 \arcsin{\left(\frac{3 \sqrt{3} \sqrt{x}}{2 \operatorname{abs}{\left(y - 1 \right)}} \right)}}{3} \right)}}{3 x \left(1 - y\right)}$$
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