11.49 + 20.5 + 14.9
     8.36 + 3 + 1/7.605
    (1.98/tan35)*2
    1/cos(0.001328323)-1
    (3/12.8)
    tan0.01-0.01
    sin0.01
    sqrt(0.0021083904703515625)
    59/(1+0.1)+59/(1+0.1)^2+59/(1+0.1)^3+59/(1+0.1)^4+(1250+59)/(1+0.1)^5=
    6.75 + 2.16
    6.36 + 2.16
    0.5*75
    (11100000+53011335.52)/9500000
    3.14*7*100*0.000001*5.67
    1850000* 4
    3.14*0.4*100*0.000001*5.67
    9000*360
    (35*12 +(25+95)*(12-3))*6
    (3512 +(25+95)*(12-3))*6
    ［3512 +(25+95)*(12-3) ］*6

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