Failed to parse (unknown function "\newcommand"): {\displaystyle \newcommand{\ceil}[1]{\left \lceil {#1} \right \rceil } \newcommand{\floor}[1]{\left \lfloor {#1} \right \rfloor } \newcommand{\round}[1]{\left \lfloor {#1} \right \rceil } \newcommand{\paren}[1]{\left ( {#1} \right ) } } Failed to parse (syntax error): {\displaystyle \pagecolor 333} Failed to parse (unknown function "\paren"): {\displaystyle 10\cdot\paren{\floor{\frac{z}{100}}^2-\floor{\frac{z}{100}} } + \paren{\floor{\frac{z}{100}} + 1}\cdot \floor{\paren{\frac{(z \mod 100)}{10}}} }

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