JSFiddle - React, Tailwind, and code Playground

HTML

<div class="post__info">
  <div class="post_name_wrapper">
    <div class="post__number">#88</div>
    <a class="post__author" href="https://nofap.ru/index.php?v=Diary&amp;for=1">Нарния</a>
    <div class="post__flair post__flair--army1">Превоз­могатели</div>
    <div class="post__streak">74 дн.</div>
    <div class="post__date">28.12.2016 12:09</div>
  </div>
  <div class="post-options-wrapper">
    <a class="post__option post__option--admin" href="https://nofap.ru/index.php?v=AdminEdit&amp;target=1">[▲]</a>
    <a class="post__option" href="https://nofap.ru/index.php?v=ForumDelete&amp;id=301" title="Удалить запись">Удалить</a>
  </div>
</div>

CSS

.post__info {
  display: flex;
  justify-content: space-between;
}

.post_name_wrapper, .post-options-wrapper {
  display: flex;
  flex-wrap: wrap;
}

.post__number, .post__author, .post__flair, .post__streak , .post__date {
  margin: 0 5px;
}