tan（arccos0.797）-tan（arccos0.92）
    tan（arccos0.899）-tan（arccos0.92）
    sqrt((3*√5/4+9/4+6*√2/4)* (-3*√5/4+9/4+6*√2/4)* (3*√5/4-9/4+6*√2/4) *(3*√5/4+9/4-6*√2/4))
    2+（-12）除以3乘1/3
     245/4 292/5 306/6 340/6 381/7 388/7 425/8 436/8 456/9 531/10 681/13
    e(-0.9551)
    2^-1/2
    10*35+692+180
    1-9
    114514+(114*514+(1145*14+(114*(5+1)*4+114-5-1-4)))
    11.4514+19.1980
    53136000/360000
    1771200*30
    1771200/360000
    15*3600*0.8+4*3600*120
    1650/220
    25*66
    sin1000000
    7/5*2/3+14/15*9
    (1+1.17%/12)/(1+2.83%/12)*1.076

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