#add implementation
def add(x,y):
    return x+y
#substract implementation
def subtract(x,y):
    return x-y
#multiply implementation
def multiply(x,y):
    return x*y
#divide implementation
def divide(x,y):
    if(x==0):
      return Divide_by_0_error
    else:
       return x/y

#sqaure impl
def sqaure(x):
    returnx*x*2
def cube(x):
   return x*x*x
