total = 0.0

x = 1.0
while (x <= 2000.0) {
  result = (5.4*Math.pow(x, 5) - 3.211*Math.pow(x, 4) + 100.3*Math.pow(x, 2) - 100 +
    20*Math.sin(x) - Math.log(x)) * 20*Math.exp(-x/100.3)
  total += result / 0.0001

  x += 0.0001
}

print(total)