((3839.288/1.24)×10^6×20000^2 )
    (((3839.288/1.24)×10^6×20000^2 ))/(0.8×3.4×10^4×2.483×10^11 )
    0.72*1.37*1.1*210/(2*10^5 )*(80+(8+0.4*22)/√0.0896)
    (8*0.85+42*0.7)×380/(2×109.67×700)
    7809.38/25
    19000*210*1957.24
    199.405*632.95/(10*(2090.33-632.95) )
    7415.372*10^6/(19000*1957.24)
    2090.33+499.86-632.95
    138420588444.427307/276904680.375
    1/3*2050*632.95^3-1/3*(2050-300)*(632.95-242)^3
    1/2*2050*632.95^2-1/2*(2050-300)*(632.95-242)^2
    (√((10*0.0283)^2+2*10*0.0283)-10*0.0283)*2090.33
    19000/(2090.33*300)
    2200-109.67
    (223.94*8+136.7*7+116*14+66.7*7+46*14)/50
    sqrt(2)*sqrt(3)
    4^4-(-6)^2/3+2*3
    0.72*1.37*1.1*210/(2*10^5 )*(80+(8+0.4*22)/√0.0975)
    (8*0.85+42*0.7)×380/(2×100.74×700)

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