3/(50+50/48)
    3/(50+50/60)
    (12*397.9398)/(159175.92-1326.4701*(24-1))
    (12*397.9398)/(159175.92-1326.4701*(36-1))
    (12*397.9398)/(159175.92-1326.4701*(60-1))
    (397.9398*60/159175.92)^(1/60)
    96*80%
    18000000*5000000
    -3*-3+35/(-7)+18*(-1/3)*(-1/3)
    (1.5*(5/7))-((-5/7)*2.5)+((-0.5)*(5/7))
    1.5*(5/7)-(-5/7)*(2.5)+(-0.5)*(5/7)
    1.5*(5/7)-(-5/7)*2.5+(-0.5)*(5/7)
    180-90-arctan(0.5*1.934)-arctan(0.125*1.934)
    (2*14.3*785.398*0.5*sin(0.48*π)^3)/(3*π)+(300*4.825*0.43*(sin0.48π+sin0.29π))/π
    tan(30+30)^2
    tan(60)^2
    (150,000-400,000)/(1+15%)^4
    (295.18×(3.72-1))/(6.25+0.78-1)
    [295.18×(3.72-1)]/5.25
    [295.18×(6.25+0.78-3.72)]/(6.25+0.78-1)

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