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*4)-arctan(0.01*4)-arctan(4/0.375)-arctan(4/84.85)+arctan(4/3)+arctan(4/10.61) 的值.
    题型：数学计算
    解:
          -90-arctan(0.1*4)-arctan(0.01*4)-arctan(4/0.375)-arctan(4/84.85)+arctan(4/3)+arctan(4/10.61)
        =-90-arctan0.4-arctan(0.01*4)-arctan(4/0.375)-arctan(4/84.85)+arctan(4/3)+arctan(4/10.61)
        =-90-arctan0.4-arctan0.04-arctan(4/0.375)-arctan(4/84.85)+arctan(4/3)+arctan(4/10.61)
        =-90-arctan0.4-arctan0.04-arctan10.666667-arctan(4/84.85)+arctan(4/3)+arctan(4/10.61)
        =-90-arctan0.4-arctan0.04-arctan10.666667-arctan0.047142+arctan(4/3)+arctan(4/10.61)
        =-90-arctan0.4-arctan0.04-arctan10.666667-arctan0.047142+arctan1.333333+arctan(4/10.61)
        =-90-arctan0.4-arctan0.04-arctan10.666667-arctan0.047142+arctan1.333333+arctan0.377003
        =-90-0.380506-arctan0.04-arctan10.666667-arctan0.047142+arctan1.333333+arctan0.377003
        =-90-0.380506-0.039979-arctan10.666667-arctan0.047142+arctan1.333333+arctan0.377003
        =-90-0.380506-0.039979-1.47732-arctan0.047142+arctan1.333333+arctan0.377003
        =-90-0.380506-0.039979-1.47732-0.047107+arctan1.333333+arctan0.377003
        =-90-0.380506-0.039979-1.47732-0.047107+0.927295+arctan0.377003
        =-90-0.380506-0.039979-1.47732-0.047107+0.927295+0.360526
        =-90.380506-0.039979-1.47732-0.047107+0.927295+0.360526
        =-90.420485-1.47732-0.047107+0.927295+0.360526
        =-91.897805-0.047107+0.927295+0.360526
        =-91.944912+0.927295+0.360526
        =-91.017617+0.360526
        =-90.657091
    答案:-90-arctan(0.1*4)-arctan(0.01*4)-arctan(4/0.375)-arctan(4/84.85)+arctan(4/3)+arctan(4/10.61)=-90.657091
    注：弧度制

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