add missing Simplify template for (very incomplete) Sympy simplify.py

Author: axkr

symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/sympy/simplify/Simplify.java

@@ -0,0 +1,34 @@
+package org.matheclipse.core.sympy.simplify;
+
+import org.matheclipse.core.interfaces.IAST;
+import org.matheclipse.core.interfaces.IASTMutable;
+import org.matheclipse.core.interfaces.IExpr;
+
+public class Simplify {
+  public static IExpr logCombine(IExpr expr) {
+    return logCombine(expr, false);
+  }
+
+  public static IExpr logCombine(IExpr expr, boolean force) {
+    if (expr.isPlus()) {
+      return expr;
+    }
+    if (expr.isTimes()) {
+      IAST timesAST = (IAST) expr;
+      int indexOf = timesAST.indexOf(IExpr::isLog);
+      if (indexOf < 0) {
+        return expr;
+      }
+      if (timesAST.get(indexOf).first().isPositiveResult()) {
+        IASTMutable timesReduced = timesAST.removeAtCopy(indexOf);
+        for (int i = 1; i < timesReduced.size(); i++) {
+          IExpr arg = timesReduced.get(i);
+          if (arg.isRealResult()) {
+
+          }
+        }
+      }
+    }
+    return expr;
+  }
+}