不使用循环结构累积求和

分别用for和while循环以及不使用循环语句的方法，求如下式子

# 1 for 循环
s = 0
for i in range(1,51):
    s = s + i*i*i/(i*(i+2))
print("1 for 循环: ",s)

# 2 while 循环
i = 1
s = 0
while i<=50:
    s = s + i*i*i/(i*(i+2))
    i = i+1
print("2 while 循环: ",s)
    

>>> sum(map(lambda i:pow(i,3)/(i*(i+2)), range(1,51)))
1187.1521758027898