Hi, what if we wanted to select items between the first and last child elements?

Hi, in the :nth-of-child pseudo-classes, we learned how to select, first-child, last-child, only-child, we even learned how to select any(singular) child element and any combination(:nth-child(an+b) and so forth. But these either select a single child element or an even or odd combination of child elements or a group of element that directly precedes or follows a certain child element. But what if we wanted to select a group of elements between the first and last child? This is what I understand so far.

li:first-child {
colof: #fff;
}

will target the first child element.

li:last-child {
colof: #fff;
}

will target the last child element.

li:only-child {
colof: #fff;
}

will target the list item if it is the only child of its parent element.

li:nth-child(2) {
colof: #fff;
}

will target the 2nd list item

li:nth-child(even) {
colof: #fff;
}

will target every even number list element

li:nth-child(2n+3) {
colof: #fff;
}

will first target the third list item then every 2nd list item after that

li:nth-child(-2n+6) {
colof: #fff;
}

will first target the 6th list item then every 2nd list item counting backwards. so it will select, the 6th, 4th and 2nd list items

li:nth-last-child(2n+3) {
colof: #fff;
}

will first target the 3rd list item counting backwards from the last list item then every second list item counting from the third list item from the last list item counting backwards. so if we have 10 list items it would select the 8th, 6th, 4th and 2nd list items. It will look like it selected the 2nd, 4th, 6th, 8th, but it is actually the other way around.

li:nth-last-child(-2n+3) {
colof: #fff;
}

will target the 3rd list item from the last then every 2nd list item going backwards from the direction it was originally going(which is was counting backwards) so now it will count forward. Two negatives make a positive right? so it will target the 8th list item first then the 10th list item.

Did I understand this correctly so far?

However, what if we wanted to select a combination of elements between the first and last child elements for example list elements 4, 5 and 6? or 5,6,7 ONLY? I tried many things using the stuff I've learned so far but couldn't come up with anything.