Here are some old links from my time as a data scientist freelancer with background in mathematics:
• Whatsapp Data Analysis
• Automatic Feature Engineering
• Umsatzprognose
• Prognose Kundenbindung
• Likert Skala Auswertung
• Levene Test
• Einstichproben t-Test
• Einstichproben Gauss-Test
• bike sharing
• einfaktorielle Varianzanalyse ANOVA
• Fragebogenauswertung

If you are interested in Galois-Theory, here you can find my diploma, where I compute the Galois groups of some polynomials.