How would I tell matlab to solve this equation? Without symbolic variables, we were told the graph is elliptical, mine is showing upwards curve, t is my time and will change, Z and s are given to us as variables needed to be expressed in the command window, not in the script itself, any help is appreciated, more or less how to do it, not the actual code( while that will still be helpful)

the equation was provided, it was just asking how to input it to ask matlab to solve it. the variable Z is -20+30i , and the variable s is -4-i , from t=0 to t=4

z(t) = ZtPest z(t) = ZtPest