Kotlin "hello world!" Function

kotlin-hello-world.kt

// This is my answer to https://www.codewars.com/kata/523b4ff7adca849afe000035/train/kotlin
// Please don't try this at home, kids.

import kotlin.math.*

private val bird = 33

fun greet() =
    """
        Oh yay, another starter function.  Why is it always 'hello, world!'?
        Apparently it started with 'A Tutorial Introduction to the Language B',
        a book by Brian Kernighan. Usage continued with 'The C Programming Language',
        also written by Kernighan along with Dennis Ritchie. If you're not familiar, 
        it's a super important book for a myriad of reasons and most modern languages
        have concepts/syntax/conventions influenced by C.
        With that said, this is an awful way to write a 'hello, world!' program.
        If you learn anything here, make sure it's this bit of history, not the
        gratuitous code below.        
    """
        .trimIndent()
        .filter { it.isLetter() }
        .filterNot { it.isUpperCase() }
        .slice(((PI * (100.2 + floor(12.345678))).toInt())..((984.0) / E).toInt())
        .map { max(it.toLong() * PI.pow(84 % 7), it.toDouble().ulp).toLong() }
        .filterNot { it < floor(133.33 % 12.31).pow(2) }
        .joinToString("") { it.toChar().toString().toLowerCase() }
        .chunked(4372 % 397)
        .joinToString('\u0020'.toString())
        .plus((bird).toChar().toString())