Sand castle build with math function

myminifactory

I start by applying this equation to build my sand castle: z equals cos of x raised to the power of 1.5 times cos of y raised to the power of 1.5. Next, I investigate ways to maximize the central peak of my castle. After some research, I discover a new formula that achieves just that: z equals negative cos of x times cos of y times the quantity minus 2 times the exponential of the negative one fourth times the sum of x squared and y squared.