Expression 3: tangent to the negative 1st power StartFraction, "h" Over 2 , EndFraction tilde 2tangent to the negative 1st power StartFraction, "h" Over 5 , EndFraction left brace, 1 less than "h" , right bracetan−1h2~2tan−1h51<h
3
Expression 4:
4
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center: left parenthesis, 0 , 0 , right parenthesis0,0