運算式 6: 3 tilde StartRoot, "A" squared plus 2 squared , EndRoot cosine left parenthesis, tan to the negative 1st power StartFraction, 2 Over "A" Subscript, "B" , Baseline , EndFraction minus 30 , right parenthesis3~A2B+22costan−12AB−30
6
運算式 7:
7
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center: left parenthesis, 0 , 0 , right parenthesis0,0
