Add simplify(expression) function

src/net/apocalypselabs/symat/Functions.java

@@ -106,6 +106,10 @@ public class Functions {
         return sym("Factor(" + function + ")");
     }
     
+    public String simplify(String expr) {
+        return sym("Simplify("+expr+")");
+    }
+
     public double rad(double degrees) {
         return degrees * (PI / 180);
     }