问题及解答

>>  2+(0-1)
in> 2+(0-1)

out> (2+-1)

------------------------

已解决

>> sum(1/sqrt(n),n,1,3)
in> sum(1/sqrt(n),n,1,3)

out> sqrt/1+sqrt/2+sqrt/3+0

------------------------

[BUG]

>> 2.71828183^2.3025
in> 2.71828183^2.3025

out> 2.1100000000

------------------------

>> ln(65)
in> ln(65)
out> 138.31776583

------------------------

不知道改动了哪一部分的代码，导致上次的 BUG 继续出现.

>> 2+(-1/2)
in> 2+(-1/2)

out> 
(4+-1)|2

==================

现已经修复,  问题出在 fr_addtion 函数.

>> 2+(-1/2)
in> 2+(-1/2)

out> 3|2