using Symata # load Symata and enter symata mode

OutputStyle(JupyterForm)

ex  = (x-y)*(z-y) + Sqrt((x-y)*(z-y))

Cse(ex)

f(a,b,Splat([c,d]))

Fold(f, [x,a,b,c])

Fold(ReplaceAll, Splat(Cse(ex)))[1]

Fold(ReplaceAll, Splat(Cse(ex)))[1] == ex

ClearAll(ex)

Together(1/x + 1/y + 1/z)

Together(1/(x*y) + 1/y^2) 

Together(1/(1 + 1/x) + 1/(1 + 1/y))

Together(Exp(1/x + 1/y))

Together(Exp(1/x + 1/y), Deep => True)

Apart(y/(x + 2)/(x + 1), x)

Apart(y/(x^2 + x + 1), x, Full=>True)

Collect(a*x^2 + b*x^2 + a*x - b*x + c, x)

Collect(a*x*Log(x) + (b+a)*(x*Log(x)), x*Log(x))

VersionInfo()

InputForm(Now())