diff --git a/vlib/v/ast/ast.v b/vlib/v/ast/ast.v
index 6bad0cb34f..a4744a0fad 100644
--- a/vlib/v/ast/ast.v
+++ b/vlib/v/ast/ast.v
@@ -11,7 +11,7 @@ import (
 pub type Expr = InfixExpr | IfExpr | StringLiteral | IntegerLiteral | CharLiteral | 	
 FloatLiteral | Ident | CallExpr | BoolLiteral | StructInit | ArrayInit | SelectorExpr | PostfixExpr | 	
 AssignExpr | PrefixExpr | MethodCallExpr | IndexExpr | RangeExpr | MatchExpr | 	
-CastExpr | EnumVal | Assoc | SizeOf | None | MapInit | OrExpr
+CastExpr | EnumVal | Assoc | SizeOf | None | MapInit | OrExpr | ParExpr
 
 pub type Stmt = VarDecl | GlobalDecl | FnDecl | Return | Module | Import | ExprStmt | 	
 ForStmt | StructDecl | ForCStmt | ForInStmt | CompIf | ConstDecl | Attr | BranchStmt | 	
@@ -433,6 +433,12 @@ pub:
 	stmts []Stmt
 }
 
+// `(3+4)`
+pub struct ParExpr {
+pub:
+	expr Expr
+}
+
 pub struct AssignExpr {
 pub:
 	op   token.Kind
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index c1cec26c6c..0c95c2c46d 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -101,6 +101,9 @@ fn (f mut Fmt) stmt(node ast.Stmt) {
 	match node {
 		ast.AssignStmt {
 			for i, left in it.left {
+				if left.var_info().is_mut {
+					f.write('mut ')
+				}
 				f.expr(left)
 				if i < it.left.len - 1 {
 					f.write(', ')
@@ -426,6 +429,11 @@ fn (f mut Fmt) expr(node ast.Expr) {
 			f.write(it.var_name + ' := ')
 			f.expr(it.expr)
 		}
+		ast.ParExpr{
+			f.write('(')
+			f.expr(it.expr)
+			f.write(')')
+			}
 		ast.PostfixExpr {
 			f.expr(it.expr)
 			f.write(it.op.str())
diff --git a/vlib/v/parser/parser.v b/vlib/v/parser/parser.v
index a08ddae574..4269e391cb 100644
--- a/vlib/v/parser/parser.v
+++ b/vlib/v/parser/parser.v
@@ -57,7 +57,7 @@ pub fn parse_stmt(text string, table &table.Table, scope &ast.Scope) ast.Stmt {
 		pref: &pref.Preferences{}
 		scope: scope
 		// scope: &ast.Scope{start_pos: 0, parent: 0}
-		
+
 	}
 	p.init_parse_fns()
 	p.read_first_token()
@@ -329,7 +329,7 @@ pub fn (p mut Parser) stmt() ast.Stmt {
 			return ast.ExprStmt{
 				expr: expr
 				// typ: typ
-				
+
 			}
 		}
 	}
@@ -621,7 +621,7 @@ pub fn (p mut Parser) name_expr() ast.Expr {
 		p.expr_mod = ''
 		return ast.EnumVal{
 			enum_name: enum_name // lp.prepend_mod(enum_name)
-			
+
 			val: val
 			pos: p.tok.position()
 		}
@@ -684,6 +684,9 @@ pub fn (p mut Parser) expr(precedence int) (ast.Expr,table.Type) {
 			p.check(.lpar)
 			node,typ = p.expr(0)
 			p.check(.rpar)
+			node = ast.ParExpr{
+				expr: node
+			}
 		}
 		.key_if {
 			node = p.if_expr()
@@ -1165,11 +1168,11 @@ fn (p mut Parser) if_expr() ast.Expr {
 		stmts: stmts
 		else_stmts: else_stmts
 		// typ: typ
-		
+
 		pos: pos
 		has_else: has_else
 		// left: left
-		
+
 	}
 	return node
 }
@@ -1585,12 +1588,12 @@ fn (p mut Parser) var_decl_and_assign_stmt() ast.Stmt {
 		return ast.VarDecl{
 			name: ident.name
 			// name2: name2
-			
+
 			expr: expr // p.expr(token.lowest_prec)
-			
+
 			is_mut: info0.is_mut
 			// typ: typ
-			
+
 			pos: p.tok.position()
 		}
 		// return p.var_decl(ident[0], exprs[0])
@@ -1728,7 +1731,7 @@ fn (p mut Parser) match_expr() ast.Expr {
 		blocks: blocks
 		match_exprs: match_exprs
 		// typ: typ
-		
+
 		cond: cond
 	}
 	return node