Overview: 7 questions will be solved this time.Among them
           ☆6 arithmetic calculations
           ☆1 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1/0
    Solution:
    1/0 = 
    Column vertical calculation:

输入有误：0 不能作为除数。

[2/7 Formula]
    Work: Calculate the value of equation sqrt(-1) .
    Question type: Mathematical calculation
    Solution:
          sqrt(-1)
        =sqrt(-1)
        =-nan
    Answer:sqrt(-1)=-
[3/7 Formula]
    Work: Calculate the value of equation ln(-2) .
    Question type: Mathematical calculation
    Solution:
          ln(-2)
        =ln(-2)
        =0
    Answer:ln(-2)=0
[4/7 Formula]
    Work: Calculate the value of equation 0^(-3) .
    Question type: Mathematical calculation
    Solution:
          0^(-3)
        =0^(-3)
        =inf
    Answer:0^(-3)=inf
[5/7 Formula]
    Work: Calculate the value of equation tan90 .
    Question type: Mathematical calculation
    Solution:
          tan90
        =-1.9952
    Answer:tan90=-1.9952
    Note: Radian
[6/7 Formula]
    Work: Calculate the value of equation arcsin2 .
    Question type: Mathematical calculation
    Solution:
          arcsin2
        =0
    Answer:arcsin2=0
    Note: Radian
[7/7 Formula]
    Work: Calculate the value of equation arccos(-2) .
    Question type: Mathematical calculation
    Solution:
          arccos(-2)
        =arccos(-2)
        =0
    Answer:arccos(-2)=0
    Note: Radian

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>>注：本次最多计算 7 道题。

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