diff --git a/src/main/java/dev/sillyangel/calc/utils b/src/main/java/dev/sillyangel/calc/utils
new file mode 100644
index 0000000..94844a3
--- /dev/null
+++ b/src/main/java/dev/sillyangel/calc/utils
@@ -0,0 +1,104 @@
+utils.java
+package dev.sillyangel.calc;
+
+public class utils {
+    // private double result;
+    // private boolean resultVisible;
+    private Calculator ci;
+    public utils(Calculator ci) {
+        System.out.printf(""); 
+        this.ci = ci;
+    }
+
+    public void reciprocal() {
+        String tmp = ci.display.getText();
+        if (tmp == null || tmp.isEmpty()) {
+            return;
+        }
+        try {
+            double value = Double.parseDouble(tmp);
+            if (value != 0) {
+                ci.result = 1.0 / value;
+                ci.display.setText("" + ci.result);
+                ci.resultVisible = true;
+            } else {
+                ci.display.setText("Error: Div by Zero");
+                ci.resultVisible = false;
+            }
+        } catch (NumberFormatException e) {
+            ci.display.setText("Error: Invalid Input");
+            ci.resultVisible = false;
+        }
+    }
+
+    public void clearAll() {
+        ci.display.setText("");
+        ci.operand1 = "";
+        ci.operand2 = "";
+        ci.operator = "";
+    }
+
+    public void square() {
+        String tmp = ci.display.getText();
+        if (tmp == null || tmp.isEmpty()) return;
+        double value = Double.parseDouble(tmp);
+        ci.result = value * value;
+        ci.display.setText("" + ci.result);
+        ci.resultVisible = true;
+    }
+
+    public void squareRoot() {
+        String tmp = ci.display.getText();
+        if (tmp == null || tmp.isEmpty()) return;
+        double value = Double.parseDouble(tmp);
+        if (value >= 0) {
+            ci.result = Math.sqrt(value);
+            ci.display.setText("" + ci.result);
+            ci.resultVisible = true;
+        }
+    }
+
+    public void backspace() {
+		String tmp = ci.display.getText();
+		if (tmp.length()>1) // if there is more than 1 character
+		    ci.display.setText( tmp.substring(0, tmp.length()-1) );
+		else // otherwise just make display empty
+		    ci.display.setText("");
+	}
+
+    public void math() {
+		ci.operand2 = ci.display.getText();
+		double op1 = Double.parseDouble(ci.operand1);
+		double op2 = Double.parseDouble(ci.operand2);
+
+		if ("+".equals(ci.operator)) {
+			ci.result = op1+op2;
+		} else if ("-".equals(ci.operator)) {
+			ci.result = op1-op2;
+		} else if ("*".equals(ci.operator)) {
+			ci.result = op1*op2;
+		} else if ("/".equals(ci.operator)) {
+			ci.result = op1/op2;
+		} else if ("%".equals(ci.operator)) {
+			ci.result = op1 % op2;
+		} else {
+			ci.result = op2;
+			System.out.println("Op: " + op1);
+			System.out.println("Op2: " + op2);
+		}
+
+		// Save calculation to history
+		if (!ci.operator.isEmpty()) {
+			String calculation = ci.operand1 + " " + ci.operator + " " + ci.operand2 + " = " + ci.result;
+			ci.history.saveToHistory(calculation);
+		}
+
+		ci.operator = "";
+		ci.operand1 = "";
+		ci.operand2 = "";
+
+		resultVisible = true;
+		display.setText(""+result);
+		saveToUndoStack(""+result);
+	}
+}
\ No newline at end of file