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代码：
$$\enclose{horizontalstrike} { Input anything you want to delete. }$$但是效果会看起来全部粘在一起，就像这样：
$$\enclose{horizontalstrike} { Input anything you want to delete. }$$
你需要做的是，在每个空格位置增加\;
$$\enclose{horizontalstrike} { Input\;anything\;you\;want\;to\;delete. }$$效果：
$$\enclose{horizontalstrike} { Input\;anything\;you\;want\;to\;delete. }$$
使用例：
$${\color{red} \enclose{horizontalstrike}{(x^\mu)'=0}} 效果：
$${\color{red} \enclose{horizontalstrike}{(x^\mu)'=0}} \; \; (x^n)'=nx^{n-1}$$