diff --git a/calculator/__init__.py b/calculator/__init__.py
index ad8e9df..3a66ee4 100644
--- a/calculator/__init__.py
+++ b/calculator/__init__.py
@@ -1 +1 @@
-from .calcurator import add, subtract, divide, multiply
\ No newline at end of file
+from .calculator import add, subtract, divide, multiply, exponentiate, root_square
diff --git a/calculator/calcurator.py b/calculator/calculator.py
similarity index 67%
rename from calculator/calcurator.py
rename to calculator/calculator.py
index 51cb993..fab219c 100644
--- a/calculator/calcurator.py
+++ b/calculator/calculator.py
@@ -1,11 +1,16 @@
+import math
+
+
 def add(x, y):
     """Returns the sum of x and y."""
     return x + y
 
+
 def multiply(x, y):
     """Returns the product of x and y."""
     return x * y
 
+
 def divide(x, y):
     """Returns the result of dividing x by y."""
     if y != 0:
@@ -13,6 +18,17 @@ def divide(x, y):
     else:
         return "Error: Division by zero"
 
+
 def subtract(x, y):
     """Returns the difference between x and y."""
     return x - y
+
+
+def exponentiate(x, y):
+    """Returns x raised to the power of y."""
+    return x**y
+
+
+def root_square(x):
+    """Returns the square root of x."""
+    return math.sqrt(x)
diff --git a/calculator/tests/unit_tests_calculator.py b/calculator/tests/unit_tests_calculator.py
index 3295ba8..2f11441 100644
--- a/calculator/tests/unit_tests_calculator.py
+++ b/calculator/tests/unit_tests_calculator.py
@@ -1,23 +1,39 @@
 # test_calculator.py
 
-from calculator import add, multiply, divide, subtract
+from calculator import add, multiply, divide, subtract, exponentiate, root_square
+
 
 def test_addition():
     assert add(5, 3) == 8
     assert add(0, 0) == 0
     assert add(-5, 5) == 0
 
+
 def test_multiplication():
     assert multiply(4, 6) == 24
     assert multiply(0, 10) == 0
     assert multiply(-3, 7) == -21
 
+
 def test_division():
     assert divide(8, 2) == 4.0
     assert divide(10, 5) == 2.0
     assert divide(7, 0) == "Error: Division by zero"
 
+
 def test_subtraction():
     assert subtract(10, 7) == 3
     assert subtract(5, 5) == 0
     assert subtract(7, 10) == -3
+
+
+def test_exponentiate():
+    assert exponentiate(2, 2) == 4
+    assert exponentiate(-3, 3) == -27
+    assert exponentiate(9, 0) == 1
+
+
+def test_root_square():
+    assert root_square(4) == 2
+    assert root_square(25) == 5
+    assert root_square(9) == 3