Mathematics
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    tan(45+8.2/2)×e^(πtan8.2)
    6*46*46
    2*(10*6+10*12+6*12)
    2*(50*40+50*78+40*78)
    ((19.8*1.3+20*2.5+22*1.8+24*1.2)×111.79+15×(-145.87))/(18.90×14.3+20)
    (111.79-1)×1/(tan18.2)
    (0.06-1)×1/(tan18.2)
    2*500/sqrt(3)*ln(0.05/0.05)-300+300*0.05^2/(0.1^2-0.05^2)*(0.1^2/0.05^2-1)
    (tan54.1)×e^(πtan45)
    (tan54.1)^2×e^(πtan45)
    2*500/sqrt(3)*ln(0.0617/0.05)-300+300*0.05^2/(0.1^2-0.05^2)*(0.1^2/0.0617^2-1)
    1/4*60+18
    3/4*60-12
    ((19.8*1.3+20*2.5+22*1.8+24*1.2)×0.06+15×0.84)/(18.90×14.3+20)
    ((19.8*1.3+20*2.5+22*1.8+24*1.2×0.06+15×0.84)/((19.4*1.7+19.2*3.1+19.8*3+20*2.5+22*1.8+24*1.2)+20)
    1.25×1.0×25×(0.5×0.5×10+0.4×0.5×10)
    2*500/sqrt(3)*ln(0.0617/0.05)-300+300*0.05^2/(0.1^2-0.05^2)*(0.1^2/0.5^2-1)
    (tan60)^2×e^(πtan30)
    1.0×0.75×(14.3×500×500+360×4455)
    (0.06-1)×1/(tan40)

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