1. геометрия   chemistry   history   geometry   algebra   Hint Half-n-half Clue   2. тригонометрия   psychology   astronomy   geometry   trigonometry   Half-n-half Clue   3. исчисление   calculus   philosophy   psychology   trigonometry   Half-n-half Clue   4. химия   astronomy   chemistry   history   geography   Half-n-half Clue   5. зоология   algebra   history   zoology   trigonometry   Half-n-half Clue   6. история   biology   geometry   history   chemistry   Half-n-half Clue   7. геология   philosophy   geology   botany   history   Half-n-half Clue