Update cheatsheets

eva

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# eva
+
+> Simple calculator REPL, similar to `bc`, with syntax highlighting and persistent history.
+> More information: <https://github.com/NerdyPepper/eva>.
+
+- Run the calculator in interactive mode:
+
+`eva`
+
+- Calculate the result of an expression:
+
+`eva "{{(1 + 2) * 2 ^ 2}}"`
+
+- Calculate an expression forcing the number of decimal places to 5:
+
+`eva --fix {{5}} "{{5 / 3}}"`
+
+- Calculate an expression with sine and cosine:
+
+`eva "{{sin(1) + cos(1)}}"`