Onde è esploso: sono in pari, Per farlo ho costruito tool per fare speed up. Sistemati tutti gli errori di compilazione dati dalla libreria. Ora si compila senza warning (nuovo standard)

jacbr.sty

@@ -1,10 +1,11 @@
 %!!	ffmpeg -i logo.svg -vf scale=64:64 favicon.png
-\ProvidesPackage{jacbr}
+% \ProvidesPackage{jacbr}
+\ProvidesPackage{./../jacbr}
 
 \RequirePackage[most]{tcolorbox}
 \RequirePackage{subcaption}
 
-\usepackage[utf8]{inputenc}
+% \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
 \usepackage[a4paper,margin=2cm,nohead,foot=0.5cm]{geometry}
 \usepackage{xcolor}
@@ -77,9 +78,10 @@
 %fare siusetup
 
 % Header
-\setlength{\headheight}{14pt}
+\setlength{\headheight}{14.5pt}
 \setlength{\headsep}{10pt}
-\addtolength{\topmargin}{-5pt}
+\addtolength{\topmargin}{-5.5pt}
+\setlength{\footskip}{14.5pt}
 
 \fancyhf{}
 \fancyhead[L]{\textbf{\thetitle} --- \monthname{\the\month} \the\year}
@@ -120,6 +122,8 @@
 \newcommand{\derx}[1]{\frac{d #1}{dx}}
 \newcommand{\derxx}[1]{\frac{d^2 #1}{dx^2}}
 \newcommand{\der}[2]{\frac{d #1}{d #2}}
+\newcommand{\pder}[2]{\frac{\partial #1}{\partial #2}}
+
 %per le parentesi
 \newcommand{\8}{\left(}
 \newcommand{\9}{\right)}