def sum_negativenum(nums):
  
  sum_negativenum = list(filter(lambda nums:nums<0,nums))
  return sum(sum_negativenum)
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result