How to solve "TypeError: cannot convert the series to <class 'float'>"

Question

i am trying to create 275 combinations of band math using SQRT and EXP formula from math function in Python colab. I shared a few of examples in the code. However its showing cannot convert the series to <class 'float'>".

Here is my data set

B1	B2	B3	B4	B5
0.00439692	0.00669470	0.00709244	0.00138463	0.00082949
0.00268081	0.00442490	0.00932365	0.00363630	0.00259743
0.00595678	0.00964592	0.01350229	0.00312168	0.00195143
0.00741656	0.01167483	0.01178257	0.00185384	0.00109784
0.00640803	0.01088445	0.01627570	0.00365191	0.00229167
0.00942690	0.01618098	0.02002952	0.00289232	0.00172712
0.01083990	0.01778892	0.01892802	0.00260200	0.00153798
0.01165114	0.01894717	0.01811242	0.00237668	0.00139010
0.01467558	0.02165251	0.01496117	0.00174461	0.00100996
0.00936932	0.01354002	0.01100198	0.00245107	0.00175631
0.00737726	0.01144956	0.01004752	0.00152895	0.00090166
0.01039346	0.01539063	0.01099578	0.00144151	0.00084624
0.00864751	0.01287212	0.01001831	0.00149957	0.00088681

import numpy as np
import pandas as pd 

# Load your dataset in Excel format
data = pd.read_excel("/content/B1_B11_S3_March - Copy.xlsx")
data

#BMF_log matric function
import math
SQRT = math.sqrt

#Band normal log matric formula (B287-B561)
#B12-B61
B12 = SQRT(data.B1 + data.B2)
B13 = SQRT(data.B1 - data.B2)
B14 = SQRT(data.B1 * data.B2)
B15 = SQRT(data.B1 / data.B2)
B16 = SQRT((data.B1 - data.B2) / (data.B1 + data.B2))

#Exponential formula
B12 = math.exp(data.B1 + data.B2)
B13 = math.exp(data.B1 - data.B2)
B14 = math.exp(data.B1 * data.B2)
B15 = math.exp(data.B1 / data.B2)
B16 = math.exp((data.B1 - data.B2) / (data.B1 + data.B2))

Any sort of help highly appreciated.

Many thanks in advance.