diff --git a/README.md b/README.md
index a2d4024..a89a8ca 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ This is a PyTorch implementation of [Neural Arithmetic Logic Units](https://arxi
 ## API
 
 ```python
+from models import *
+
 # single layer modules
 NAC(in_features, out_features)
 NALU(in_features, out_features)
@@ -39,12 +41,12 @@ To reproduce "Simple Function Learning Tasks" (Section 4.1), run:
 ```python
 python function_learning.py
 ```
-This should generate a text file called `interpolation.txt` with the following results. (Currently only supports interpolation, I'm working on the rest. Also getting `nans` which I'm investigating.)
+This should generate a text file called `interpolation.txt` with the following results. (Currently only supports interpolation, I'm working on the rest)
 
 |       | Relu6    | None     | NAC      | NALU   |
 |-------|----------|----------|----------|--------|
-| a + b | 0.002    | 0.000    | 0.000    | 1.399  |
-| a - b | 0.046    | 0.000    | 0.000    | 0.224  |
-| a * b | 83.012   | 99.590   | 98.822   | 12.237 |
-| a / b | 2245.560 | 2888.195 | 2765.908 | nan    |
-| a ^ 2 | 76.126   | 99.106   | 99.559   | nan    |
+| a + b | 0.002    | 0.004    | 0.001    | 0.017  |
+| a - b | 0.046    | 0.005    | 0.000    | 0.003  |
+| a * b | 83.012   | 0.444    | 5.218    | 5.218  |
+| a / b | 106.441  | 0.338    | 2.096    | 2.096  |
+| a ^ 2 | 94.103   | 0.630    | 3.871    | 0.196  |
diff --git a/function_learning.py b/function_learning.py
index ee2bce5..3cb8b69 100644
--- a/function_learning.py
+++ b/function_learning.py
@@ -13,14 +13,15 @@ NORMALIZE = True
 NUM_LAYERS = 2
 HIDDEN_DIM = 2
 LEARNING_RATE = 1e-3
-NUM_ITERS = int(8e4)
-RANGE = [-5, 5]
+NUM_ITERS = int(7e4)
+RANGE = [5, 10]
 ARITHMETIC_FUNCTIONS = {
     'add': lambda x, y: x + y,
     'sub': lambda x, y: x - y,
     'mul': lambda x, y: x * y,
     'div': lambda x, y: x / y,
     'squared': lambda x, y: torch.pow(x, 2),
+    'root': lambda x, y: torch.sqrt(x),
 }
 
 
@@ -137,4 +138,3 @@ def main():
 
 if __name__ == '__main__':
     main()
-
diff --git a/results/interpolation.txt b/results/interpolation.txt
deleted file mode 100644
index 8e9ec43..0000000
--- a/results/interpolation.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-Relu6	None	NAC	NALU
-0.002	0.000	0.000	1.399
-0.046	0.000	0.000	0.224
-83.012	99.590	98.822	12.237
-2245.560	2888.195	2765.908	nan
-76.126	99.106	99.559	nan