Hi first thank you for making this, It is much better than other calculator plugins. Can you make it so I can use square brackets [ ] and curly brackets { } So if there are many brackets in the command I can use different brackets to make it more clear like a + {[b - (c / d)] * 3}

Fixed unary positive operation resulting in negation since v0.1.28 (80ceccf) Further optimized expression evaluation (6d0c799) Implemented modulo operator strength reduction for identity property ((a % n) % n => a % n) (bca7b17, 9853547) Removed functions rand() and getrandmax() (these functions exist in PHP only for backward compatibility) (ce8dfb3) mt_rand() now accepts zero parameters (in addition to accepting two parameters) (8194bf3, f73be61) Implemented mode constants for round() (HALF_UP, HALF_DOWN, HALF_EVEN, HALF_ODD) (c21ce74, 90c0f5d) Renamed FunctionRegistry::register() to FunctionRegistry::register() (ad07641) Renamed ConstantRegistry::register() to ConstantRegistry::registerLabel() (1b0d2d5) Moved FunctionRegistry::registerMacro() to MacroRegistry::registerFunction() (0d0889f) Implemented object-like macros that can be registered by calling MacroRegistry::registerObject() (34e5ad7)

Hi this request for adding variable support to plugin

When user types expression sender can set value of variable:

(Sender) /calc x + 1
(Server) Enter value for variable x:
(Sender) 3
(Server) x + 1 = 4 where x = 3

(Sender) /calc x + 1
(Server) Enter value for variable x:
(Sender) pi / 4
(Server) x + 1 = 1.7 where x = 0.7

For this cyou can use await-std to be done easy (code adapted from https://github.com/SOF3/await-std-examples/blob/master/BanHammer/src/SOFe/BanHammer/Main.php)

$expr = implode(" ", $args);
Await::f2c(function() use($sender, $expr) : Generator{
	try{
		$values = [];
		foreach(expr variables as variable){
			$sender->sendMessage("Enter value for variable "  + $variable);
			$value = $std->consumeNextChat($sender);
			$values[variable] = $value;
		}

		evaluate expression using $values
	}catch(QuitException){
		// do nothing if $sender quit
	}
});