In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

In mathematical analysis , the maxima and minima ( the respective plurals of maximum and minimum ) of a function , known collectively as extrema ( the plural of extremum ) , are the largest and smallest value of the function , either within a given range ( the local or relative extrema ) or on the entire domain of a function ( the global or absolute extrema ) .
In mathematics , the maximum and minimum of a function are the largest and smallest value that the function takes at a given point .

As a philosopher , Ernst Haeckel wrote " Die Weltra thsel " ( 1895 1899 ; in English : " The Riddle of the Universe " , 1901 ) , the genesis for the term " world riddle " ( " Weltra tsel " ) ; and " Freedom in Science and Teaching " to support teaching evolution .
As a philosopher , Ernst Haeckel wrote " Die Weltra tsel " ( 1895 1899 , " The Riddle of the Universe " , 1901 ) , and " Freedom in Science and Teaching " to support teaching evolution .

The President of the Council of Ministers of the Italian Republic ( Italian : " Presidente del Consiglio dei ministri della Repubblica Italiana " ) , commonly referred to in Italy as Presidente del Consiglio , or informally as Premier and known in English as the Prime Minister of Italy , is the head of government of the Italian Republic .
The Prime Minister of Italy , officially President of the Council of Ministers , is the head of government of Italy .