diff --git a/multigrid/Cargo.toml b/multigrid/Cargo.toml
index 69dcd5e..91490c4 100644
--- a/multigrid/Cargo.toml
+++ b/multigrid/Cargo.toml
@@ -17,4 +17,4 @@ serde = { version = "1.0.115", features = ["derive"] }
 json5 = "0.3.0"
 indexmap = { version = "1.5.2", features = ["serde-1"] }
 argh = "0.1.4"
-evalexpr = "6.2.0"
+evalexpr = "6.3.0"
diff --git a/multigrid/src/eval/evalexpr.rs b/multigrid/src/eval/evalexpr.rs
index a0511e5..e999252 100644
--- a/multigrid/src/eval/evalexpr.rs
+++ b/multigrid/src/eval/evalexpr.rs
@@ -359,69 +359,5 @@ pub fn default_context() -> HashMapContext {
         )
         .unwrap();
 
-    context
-        .set_function(
-            "math::atan2".into(),
-            Function::new(|arg| {
-                let arg = arg.as_tuple()?;
-                if arg.len() != 2 {
-                    return Err(error::EvalexprError::WrongFunctionArgumentAmount {
-                        expected: 2,
-                        actual: arg.len(),
-                    });
-                }
-                let s = arg[0].as_number()?;
-                let o = arg[1].as_number()?;
-                Ok(s.atan2(o).into())
-            }),
-        )
-        .unwrap();
-
-    context
-        .set_function(
-            "math::hypot".into(),
-            Function::new(|arg| {
-                let arg = arg.as_tuple()?;
-                if arg.len() != 2 {
-                    return Err(error::EvalexprError::WrongFunctionArgumentAmount {
-                        expected: 2,
-                        actual: arg.len(),
-                    });
-                }
-                let s = arg[0].as_number()?;
-                let o = arg[1].as_number()?;
-                Ok(s.hypot(o).into())
-            }),
-        )
-        .unwrap();
-
-    context
-        .set_function(
-            "math::exp".into(),
-            Function::new(|arg| {
-                let arg = arg.as_number()?;
-                Ok(arg.exp().into())
-            }),
-        )
-        .unwrap();
-
-    context
-        .set_function(
-            "math::pow".into(),
-            Function::new(|arg| {
-                let arg = arg.as_tuple()?;
-                if arg.len() != 2 {
-                    return Err(error::EvalexprError::WrongFunctionArgumentAmount {
-                        expected: 2,
-                        actual: arg.len(),
-                    });
-                }
-                let s = arg[0].as_number()?;
-                let o = arg[1].as_number()?;
-                Ok(s.powf(o).into())
-            }),
-        )
-        .unwrap();
-
     context
 }