diff --git a/src/function_imaging.pas b/src/function_imaging.pas
index 1c08893..85c2335 100644
--- a/src/function_imaging.pas
+++ b/src/function_imaging.pas
@@ -19,7 +19,7 @@ begin
   with args do begin
     width := 512;
     height := 512;
-    f := 'sin(x) - y';
+    f := 'y = sin(x)';
     zoom := 10;
     centerX := 0;
     centerY := 0;
@@ -54,9 +54,14 @@ var
 begin
   fname := '{f}_(z={z},cx={cx},cy={cy},WxH={w}x{h}).bmp';
   
+  // replacing illegal characters for the filename
   fn := stringReplace(args.f, ' ', '', [rfReplaceAll]);
   fn := stringReplace(fn, '*', '', [rfReplaceAll]);
   fn := stringReplace(fn, '/', ' div ', [rfReplaceAll]);
+  fn := stringReplace(fn, '<', ' lt ', [rfReplaceAll]);
+  fn := stringReplace(fn, '<=', ' le ', [rfReplaceAll]);
+  fn := stringReplace(fn, '>', ' gt ', [rfReplaceAll]);
+  fn := stringReplace(fn, '>=', ' ge ', [rfReplaceAll]);
   
   fname := StringReplace(fname, '{f}', fn, []);
   fname := StringReplace(fname, '{z}', floatToStr(args.zoom), []);
diff --git a/src/multibrot_imaging.pas b/src/multibrot_imaging.pas
index 7601759..dc0122f 100644
--- a/src/multibrot_imaging.pas
+++ b/src/multibrot_imaging.pas
@@ -6,9 +6,9 @@ uses sysutils, BMPImage, ucomplex, utils;
 
 type
   TArgs = record
-    power: longint;
     width: longint; // TryStrToInt wants longint
     height: longint;
+    power: longint;
     zoom: extended;
     center_x: extended;
     center_y: extended;
@@ -68,13 +68,13 @@ end;
 procedure setDefaultArgs(var args: TArgs);
 begin
   with args do begin
-    power := 2;
     width := 512;
     height := 512;
+    power := 2;
     zoom := 1;
     center_x := 0;
     center_y := 0;
-    out_path := './images';
+    out_path := './multibrot_images';
   end;
 end;
 
diff --git a/доклад.odt b/доклад.odt
index 66b351b..88b3149 100644
Binary files a/доклад.odt and b/доклад.odt differ