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$|{\bar {z}}|=|z|$

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle |(\bar{z})^n| = |z|^n }

Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \arg(z^n) = n \arg(z) }

${\begin{matrix}\left\{{\begin{matrix}x&=&l\sin \varphi \\y&=&-l\cos \varphi -a\cos \nu t\end{matrix}}\right.\end{matrix}}$

$|{\bar {z}}|=|z|$