总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 -90-arctan(0.1*40)-arctan(0.01*40)-arctan(40/0.375)-arctan(40/84.85)+arctan(40/3)+arctan(40/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan(0.1*40)-arctan(0.01*40)-arctan(40/0.375)-arctan(40/84.85)+arctan(40/3)+arctan(40/10.61)
        =-90-arctan4-arctan(0.01*40)-arctan(40/0.375)-arctan(40/84.85)+arctan(40/3)+arctan(40/10.61)
        =-90-arctan4-arctan0.4-arctan(40/0.375)-arctan(40/84.85)+arctan(40/3)+arctan(40/10.61)
        =-90-arctan4-arctan0.4-arctan106.666667-arctan(40/84.85)+arctan(40/3)+arctan(40/10.61)
        =-90-arctan4-arctan0.4-arctan106.666667-arctan0.47142+arctan(40/3)+arctan(40/10.61)
        =-90-arctan4-arctan0.4-arctan106.666667-arctan0.47142+arctan13.333333+arctan(40/10.61)
        =-90-arctan4-arctan0.4-arctan106.666667-arctan0.47142+arctan13.333333+arctan3.770028
        =-90-1.325818-arctan0.4-arctan106.666667-arctan0.47142+arctan13.333333+arctan3.770028
        =-90-1.325818-0.380506-arctan106.666667-arctan0.47142+arctan13.333333+arctan3.770028
        =-90-1.325818-0.380506-1.561422-arctan0.47142+arctan13.333333+arctan3.770028
        =-90-1.325818-0.380506-1.561422-0.440523+arctan13.333333+arctan3.770028
        =-90-1.325818-0.380506-1.561422-0.440523+1.495936+arctan3.770028
        =-90-1.325818-0.380506-1.561422-0.440523+1.495936+1.311517
        =-91.325818-0.380506-1.561422-0.440523+1.495936+1.311517
        =-91.706324-1.561422-0.440523+1.495936+1.311517
        =-93.267746-0.440523+1.495936+1.311517
        =-93.708269+1.495936+1.311517
        =-92.212333+1.311517
        =-90.900816
    答案:-90-arctan(0.1*40)-arctan(0.01*40)-arctan(40/0.375)-arctan(40/84.85)+arctan(40/3)+arctan(40/10.61)=-90.900816
    注：弧度制

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