Merge branch 'dominicsbranch' into 'main'

expressions.txt

src/main/ASTPrinter.java

src/main/Application.java

src/main/Evaluator.java

src/main/Lexer.java

src/main/Parser.java

src/main/SwingFunctionPlotter.java

src/main/Visitor.java

src/test/EvaluatorTest.java

src/test/LexerTest.java

src/test/ParserTest.java