数学

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$(\frac{1}{2})$

$\color{red}{\frac{1}{\dot{a}}$

$\color{red}{(\frac{1}{2})}$           

$\theta$

$\lvert a\rvert$

$E=mc^2$

$\fcolorbox{orange}{cyan}{\color{purple}{\huge{\dot{a}}}$

$\fcolorbox{orange}{cyan}{\huge{\color{purple}{\frac{1}{2}}}}$

$\fcolorbox{orange}{cyan}{\huge{\color{purple}{E=mc^2}}}$

$\fcolorbox{orange}{cyan}{\color{purple}{\huge{E=mc^2}}}$

$\color{cyan}{\huge{E=mc^2}}$

$\fcolorbox{orange}{cyan}{\color{darkred}{\huge{it's been a long time}}}$

$\color{cyan}{\int^牢_大}$

$\color{cyan}{\xlongequal[\quad]{H_2SO_4}}$

$\huge{\color{orange}{\xlongequal[\quad]{H_2SO_4}}}$