The Symbolic Math Toolbox is a toolbox for MATLAB that adds extra functionality in mathematics for analysis, visualisation, and manipulation.

The core addition is support for symbolic variables, which can be declared with syms x, y, z

The basics

To solve any given function, we can do:

syms t;
eqn = t^2 + 3 * t + 4;
solve(eqn == 0, t)

which declares some symbolic variable, an equation in terms of that variable, and solves it for when the function is equal to 0 with respect to t.

Other useful tools