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:algebra, prealgebra, pre-algebra,
simplify, numerical simplify, simplify numerically, evaluate
:operation, numeric simplify
:, Evaluate and Simplify
:<TD ALIGN=LEFT VALIGN=CENTER HEIGHT=30 NOWRAP>
<INPUT TYPE=TEXT NAME="formula" SIZE=25 MAXLENGTH=100 VALUE="$var_1"></TD>
<TD ALIGN=RIGHT VALIGN=center NOWRAP>
$submit1
:2/3 + 7/8, 4/7 - 4/9, (x^18-1)/(x^6-1), 1/(x+1) - 1/(x-1)