resolved fdo#60087 corrected .xlsx export of functions

Change-Id: I6c7ba47dde88a73d035b1db5f7f4cede78b262db
(cherry picked from commit 0c7a1b6e)
Reviewed-on: https://gerrit.libreoffice.org/1929Reviewed-by: Kohei Yoshida <kohei.yoshida@gmail.com>
Tested-by: Kohei Yoshida <kohei.yoshida@gmail.com>

sc/source/filter/excel/xeformula.cxx

@@ -1406,6 +1406,9 @@ void XclExpFmlaCompImpl::ProcessFunction( const XclExpScToken& rTokData )
 
 void XclExpFmlaCompImpl::PrepareFunction( XclExpFuncData& rFuncData )
 {
+    // For OOXML these are not rewritten anymore.
+    if (GetOutput() != EXC_OUTPUT_XML_2007)
+    {
         switch( rFuncData.GetOpCode() )
         {
             case ocCosecant:                // simulate CSC(x) by (1/SIN(x))
@@ -1421,6 +1424,7 @@ void XclExpFmlaCompImpl::PrepareFunction( XclExpFuncData& rFuncData )
                 break;
             default:;
         }
+    }
 }
 
 void XclExpFmlaCompImpl::FinishFunction( XclExpFuncData& rFuncData, sal_uInt8 nCloseSpaces )
@@ -1468,12 +1472,20 @@ void XclExpFmlaCompImpl::FinishFunction( XclExpFuncData& rFuncData, sal_uInt8 nC
             case ocCosecantHyp:             // simulate CSCH(x) by (1/SINH(x))
             case ocSecantHyp:               // simulate SECH(x) by (1/COSH(x))
             case ocCotHyp:                  // simulate COTH(x) by (1/TANH(x))
+                // For OOXML not rewritten anymore.
+                if (GetOutput() != EXC_OUTPUT_XML_2007)
+                {
                     AppendBinaryOperatorToken( EXC_TOKID_DIV, true );
                     AppendParenToken();
+                }
             break;
             case ocArcCot:                  // simulate ACOT(x) by (PI/2-ATAN(x))
+                // For OOXML not rewritten anymore.
+                if (GetOutput() != EXC_OUTPUT_XML_2007)
+                {
                     AppendBinaryOperatorToken( EXC_TOKID_SUB, true );
                     AppendParenToken();
+                }
             break;
 
             default:;