JSFiddle - React, Tailwind, and code Playground

HTML

(<span><span class="hide">lambda</span><span class="lambda"></span>
</span> x (+ x 1))

CSS

.hide {
  color: transparent;
  display: inline-block;
  width: 0;
}

.lambda:after {
    content:"λ";
}

JavaScript

(lambda x (+ x 1))