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→Relation to the modular lambda function: use automatically sized parens around the large fraction in the second example; unfortunately this is still kind of ugly |
→Relation to the modular lambda function: workaround for slightly smaller parens |
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& {\operatorname{sl}}\bigl(\tfrac1{18}\varpi\bigr)\, {\operatorname{sl}}\bigl(\tfrac3{18}\varpi\bigr)\,{\operatorname{sl}}\bigl(\tfrac5{18}\varpi\bigr)\,{\operatorname{sl}}\bigl(\tfrac7{18}\varpi\bigr) \\[3mu]
&\quad {}= \sqrt[8]{\frac{\lambda (9i)}{1-\lambda (9i)}}
= \tan\left(\vphantom{\frac\Big|\Big|}\right. \frac\pi4 - \arctan\left(\vphantom{\frac\Big|\Big|}\right.\frac{2\sqrt[3]{2\sqrt{3}-2}-2\sqrt[3]{2-\sqrt{3}}+\sqrt{3}-1}{\sqrt[4]{12}}\left.\left.\vphantom{\frac\Big|\Big|}\right)\right)
\end{aligned}</math>
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