private void fillPlusMinus(wp.TableCell cell, String Value, wp.Run plus, wp.Run minus, wp.Run na, wp.Run eq)
{
if (Value == "*")
cell.Elements<wp.Paragraph>().First().Append((wp.Run)na.Clone());
else if (Value == "+")
cell.Elements<wp.Paragraph>().First().Append((wp.Run)plus.Clone());
else if (Value == "-")
cell.Elements<wp.Paragraph>().First().Append((wp.Run)minus.Clone());
else
cell.Elements<wp.Paragraph>().First().Append((wp.Run)eq.Clone());
}