== should format calc value ==
:root {
  font-size: calc(100vw / 35);
}

div {
  --width: calc(10% + 30px);

  width: calc(.9%);
  width: calc(0px);
  line-height: calc(0);
  line-height: calc(2 + 3 * 4);
  line-height: calc(3 * 4 + 2);
  line-height: calc((2 + 3) * 4);
  line-height: calc(4 * (2 + 3));
  line-height: calc(-5 * 0);
}

[expect]
:root {
    font-size: calc(100vw / 35);
}

div {
    --width: calc(10% + 30px);
    width: calc(.9%);
    width: calc(0px);
    line-height: calc(0);
    line-height: calc(2 + 3 * 4);
    line-height: calc(3 * 4 + 2);
    line-height: calc((2 + 3) * 4);
    line-height: calc(4 * (2 + 3));
    line-height: calc(-5 * 0);
}