diff --git a/environment.yml b/environment.yml
index b2bce14..27f6a5a 100644
--- a/environment.yml
+++ b/environment.yml
@@ -5,3 +5,7 @@ channels:
 dependencies:
   - python>=3.6,<3.10
   - pip
+  - numpy>1.16
+  - scipy
+  - matplotlib
+  - sympy
diff --git a/envtest/builtins.py b/envtest/builtins.py
index caae7bb..48718e3 100644
--- a/envtest/builtins.py
+++ b/envtest/builtins.py
@@ -1,8 +1,19 @@
 import numpy as np
+from scipy.ndimage import gaussian_filter
+from scipy import misc
 
 
-__all__ = ['rand_array']
+__all__ = ['rand_array','smooth_image','my_mat_solve','my_pandas']
 
 
 def rand_array(shape):
     return np.random.rand(*shape)
+
+def smooth_image(a, sigma=1):
+    return gaussian_filter(a, sigma=sigma)
+    
+def my_mat_solve(A, b):
+    return A.inv()*b
+
+def my_pandas(s):
+    return s
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index d22bd8e..d21b47d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,5 @@
 numpy>1.16
+scipy
+Matplotlib
+sympy
+Pandas
\ No newline at end of file
diff --git a/scripts/my_pandas.py b/scripts/my_pandas.py
new file mode 100644
index 0000000..68284b3
--- /dev/null
+++ b/scripts/my_pandas.py
@@ -0,0 +1,5 @@
+import numpy as np
+import pandas as pd
+
+s = pd.Series([1, 3, 5, np.nan, 6, 8])
+print(s)
\ No newline at end of file
diff --git a/scripts/smooth_image.py b/scripts/smooth_image.py
index d282d61..a5d2a16 100644
--- a/scripts/smooth_image.py
+++ b/scripts/smooth_image.py
@@ -1,5 +1,18 @@
-from envtest import rand_array
+from email.mime import image
+from envtest import smooth_image
+from scipy import misc
+import matplotlib.pyplot as plt
 
-shape = (3, 3)
+image = misc.ascent()
+sigma = 5
+
+smoothed_image = smooth_image(image, sigma)
+
+f = plt.figure()
+f.add_subplot(1,2,1)
+plt.imshow(image)
+f.add_subplot(1,2,2)
+plt.imshow(smoothed_image)
+plt.show(block=True)
 
 print(rand_array(shape))
diff --git a/scripts/solve_matrix_equation.py b/scripts/solve_matrix_equation.py
new file mode 100644
index 0000000..bd43f88
--- /dev/null
+++ b/scripts/solve_matrix_equation.py
@@ -0,0 +1,8 @@
+from envtest import my_mat_solve
+from sympy.matrices import Matrix, MatrixSymbol
+
+A = Matrix([[2,1,3],[4,7,1],[2,6,8]])
+b = Matrix(MatrixSymbol('b',3,1))
+x = my_mat_solve(A,b)
+
+print(x)
\ No newline at end of file