1, 3, 3, 7 to 10

GetTen.kt

import kotlin.random.Random

fun main() {
    while (true) {
        val (result, expression) = calculate()
        if (result == 10.0) {
            println("${expression.removeSurrounding("(", ")")} = ${result.toInt()}")
            break
        }
    }
}

fun calculate(): Pair<Double, String> {
    val values = listOf(1, 3, 3, 7).shuffled()
    var result = 0.0
    var expression = ""
    for ((index, value) in values.withIndex()) {
        if (index == 0) {
            result = value.toDouble()
            expression += value
            continue
        }
        val arithmetic = Random.nextInt(0, 4)
        when (arithmetic) {
            0 -> {
                result += value
                expression = "($expression + $value)"
            }

            1 -> {
                result -= value
                expression = "($expression - $value)"
            }

            2 -> {
                result /= value
                expression = "($expression ÷ $value)"
            }

            3 -> {
                result *= value
                expression = "($expression × $value)"
            }
        }
    }
    return result to expression
}