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20px;animation:fade .18s ease;max-width:70ch}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.math-img{max-width:100%;height:auto;vertical-align:middle}.math-container{display:inline-block;vertical-align:middle}