Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v4.0.0.alpha.1)
// MathSass (v0.9.5)
// ----

@import "math";

@function mod-scale($base, $exp, $spread) {
  @return pow($base, $exp / $spread);
}

.test {
  out: mod-scale(1.5, -2, 3);
  out: mod-scale(1.5, -1.5, 3);
  out: mod-scale(1.5, -1, 3);
  out: mod-scale(1.5, 0, 3);
  out: mod-scale(1.5, 1, 3);
  out: mod-scale(1.5, 2, 3);
  out: mod-scale(1.5, 3, 3);
  out: mod-scale(1.5, 4, 3);
  out: mod-scale(1.5, 5, 3);
  out: mod-scale(1.5, 6, 3);
  out: mod-scale(1.5, 16, 3);
}

SassMeister-output.css

.test {
  out: 0.76314;
  out: 0.8165;
  out: 0.87358;
  out: 1;
  out: 1.14471;
  out: 1.31037;
  out: 1.5;
  out: 1.71707;
  out: 1.96556;
  out: 2.25;
}