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# record 1: header: parent, keywords
# record 2: calling parameters
# record 3: submit buttons
# record 4: html form content
:geometry, plot, curve, 2D curve, implicit curve,implicit,
plot implicit curve, implicit curve 2D, plane implicit curve,
curve 2D, 2D curve, graph, graphing
:picturesize1, 260
picturesize2, 260
operation, plot implicit curve 2D
size, 600x480
:, Plot implicit curve
:<TD VALIGN=TOP ALIGN=LEFT>
$submit1
<TD NOWRAP style="text-align:center;">
<INPUT NAME="formula" TYPE="text" SIZE=45 VALUE="x^4 + y^4 + 4xy">
<TR><TD COLSPAN=2 NOWRAP>
Range: x from
<INPUT SIZE=6 NAME=xrange1 VALUE=-2> to
<INPUT SIZE=6 NAME=xrange2 VALUE=2> ,
y from
<INPUT SIZE=6 NAME=yrange1 VALUE=-2> to
<INPUT SIZE=6 NAME=yrange2 VALUE=2> .
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