total = 0.0d

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

  x += 0.0001d
}

print(total)