In [1]:
    
# Import some libraries
import numpy as np
    
In [2]:
    
np.arange(7)
    
    Out[2]:
Some equations: $\int \left(f(a)^3 + \sum_{i=0}^{5} a^{i}\right) da$
In [3]:
    
a = 'abc'
b = 'def'
print(a + b * 2)
print(a * 2)
    
    
In [4]:
    
print(np.exp(5))
print('aa')
    
    
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