CAS Dialog

The CAS Dialog is a sidebar panel that provides Computer Algebra System (CAS) operations powered by SymPy. It lets you perform symbolic math operations — simplify, factor, differentiate, integrate, and more — directly on math expressions in your document.

Opening the CAS Dialog

The CAS Dialog is not open by default. To open it, type \cas-dialog in the suggestion box and select it from the list.

Once opened, the CAS Dialog appears as a panel on the right side of the editor and stays visible for the rest of your session.

How to Use

1. Type a math expression in your document (using inline math $ or a math container).
2. Place your cursor inside the math expression so the editor is in math mode.
3. Click an action in the CAS Dialog panel (e.g., Factor, Simplify).
4. Click the Run button that appears next to the action.
5. The result replaces your current expression.

Your cursor must be inside a math expression (math mode) for CAS actions to work. If you see the warning “Current selection is not in math mode”, click back into your math expression first.

The CAS Dialog Panel

The panel has a search bar at the top to filter through all 33 available actions. Actions are organized into four categories.

Algebra

Action	Description	Parameters
Substitute	Replace one symbol or expression with another	from, to
Simplify	Reduce the expression to a simpler form	—
Expand	Expand products and powers	—
Factor	Factor the expression	—
Cancel	Cancel common factors in rational expressions	—
Partial Fractions	Decompose a rational expression into partial fractions	—
Together	Combine terms into a common denominator	—
Trig Simplify	Simplify trigonometric expressions	—
Power Simplify	Combine powers with related bases or exponents	—
Radical Simplify	Simplify radicals and rationalized denominators	—
Rational Simplify	Simplify rational expressions into a canonical form	—
Combinatorial Simplify	Simplify combinatorial expressions	—
Sign Simplify	Simplify signs in expressions	—
Power Denest	Denest powers where valid	—
Log Combine	Combine logarithms where valid	—
Expand Trig	Expand trigonometric functions	—
Expand Log	Expand logarithms where valid	—
Expand Power Base	Expand powers over products where valid	—
Collect	Collect terms with respect to a variable	var
Solve	Solve an equation or expression	var

Calculus

Action	Description	Parameters
Differentiate	Differentiate with respect to a variable	var
Integrate	Integrate with respect to a variable	var
Limit	Evaluate a limit	var, to
Sum	Compute a symbolic sum with bounds	var, from, to
Product	Compute a symbolic product with bounds	var, from, to

Matrices

Action	Description
Matrix Det	Compute the determinant of a matrix
Matrix Inverse	Compute the inverse of a matrix
Matrix Transpose	Transpose a matrix
Matrix RREF	Compute reduced row echelon form
Matrix Eigenvalues	Compute matrix eigenvalues
Matrix Eigenvectors	Compute matrix eigenvectors

Assumptions

Action	Description	Parameters
Ask Predicate	Ask SymPy whether a predicate is true for the expression	—
Refine	Refine the expression under an assumption	assuming (e.g., positive(x))

Action Parameters

Some actions have input fields that let you configure the operation:

• var — the variable to operate with respect to (default: x). Used by Differentiate, Integrate, Limit, Collect, Solve, Sum, and Product.
• from / to — bounds for Sum and Product (default: 1 to 10), or the substitution values for Substitute.
• assuming — an assumption expression for Refine (e.g., positive(x)).

Searching Actions

Use the search bar at the top of the CAS Dialog to quickly find an action by name. The counter (e.g., “33/33”) shows how many actions match the current search query.