diff --git a/app/build.gradle b/app/build.gradle
index 715c083..6907dc6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -20,10 +20,11 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile fileTree(include: ['*.jar'], dir: 'libs')
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:23.4.0'
     compile 'com.android.support:design:23.4.0'
     compile 'com.rengwuxian.materialedittext:library:2.1.4'
     compile 'com.jjoe64:graphview:4.1.1'
-}
+    compile files('libs/mxparser_jdk1.7.jar')
+}
\ No newline at end of file
diff --git a/app/libs/mxparser_jdk1.7.jar b/app/libs/mxparser_jdk1.7.jar
new file mode 100644
index 0000000..e2343ad
Binary files /dev/null and b/app/libs/mxparser_jdk1.7.jar differ
diff --git a/app/src/main/java/tv/tvquetzachapin/graphfunctions/Activites/MainActivity.java b/app/src/main/java/tv/tvquetzachapin/graphfunctions/Activites/MainActivity.java
index 167218a..a23409e 100644
--- a/app/src/main/java/tv/tvquetzachapin/graphfunctions/Activites/MainActivity.java
+++ b/app/src/main/java/tv/tvquetzachapin/graphfunctions/Activites/MainActivity.java
@@ -9,6 +9,10 @@
 import android.view.View;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.widget.Toast;
+
+import org.mariuszgromada.math.mxparser.Argument;
+import org.mariuszgromada.math.mxparser.Expression;
 
 import tv.tvquetzachapin.graphfunctions.R;
 
@@ -21,7 +25,9 @@ protected void onCreate(Bundle savedInstanceState) {
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
+        operateEQ();
         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
+
         fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -52,4 +58,10 @@ public boolean onOptionsItemSelected(MenuItem item) {
 
         return super.onOptionsItemSelected(item);
     }
+
+    public void operateEQ() {
+        Argument x = new Argument("x = 5");
+        Expression e = new Expression("3*(x)^2",x);
+        Toast.makeText(MainActivity.this, "OP: " + e.calculate(), Toast.LENGTH_SHORT).show();
+    }
 }