1. geometria   trigonometry   calculus   history   geometry   Hint Half-n-half Clue   2. geografia   history   astronomy   biology   geography   Half-n-half Clue   3. fisica   geometry   physics   chemistry   history   Half-n-half Clue   4. biologia   physics   biology   geometry   botany   Half-n-half Clue   5. botanica   chemistry   physics   calculus   botany   Half-n-half Clue   6. trigonometria   trigonometry   geology   geometry   calculus   Half-n-half Clue   7. calcolo   biology   trigonometry   botany   calculus   Half-n-half Clue