\setmainfont[Ligatures=TeX]TeX Gyre Pagella \setmathfontTeX Gyre Pagella Math
 
                         __ n                                                                                            n-i     i
           Bézier(n,t) = ❯      \underset binomial term\underbrace\binomni  · \ \underset polynomial term\underbrace(1-t)     · t 
                         ‾‾ i=0