116.67/8
    8*116.67
    900*3500/((3.1415926)^2*1000^2*5)
     arctan(104.08/32.52)
    arctan(104.08/32.52)
    arctan(0.1042/0.0325)+180
    (4*546/(3.1415926*5*7.8))^0.5
    4*546/(3.1415926*5*7.8)
    (0.0325^2+0.1042^2)^0.5
    0.7658*0.1*(cos135)-0.5*0.2*cos210
     0.7658*0.1*(sin135)-0.5*0.2*sin210
    -0.7658*0.1*(sin135)-0.5*0.2*sin210
    -0.7658*0.1*(cos135)-0.5*0.2*cos210
    (sin11.3)*(sin(90-11.3+45-11.3))/((sin(90+45-11.3))*sin(11.3+11.3))
    √12^2+24^2
    (2∧0-2sin0)/[(0-sin0)ln2]
    e^35
    -100+20/（1+0.2）+40/（1+0.2）^2+50/（1+0.2）^3+60/（1+0.2）^4=
    sin180
    sin2991

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