1. исчисление   geography   calculus   algebra   astronomy   Hint Half-n-half Clue   2. алгебра   geography   algebra   botany   trigonometry   Half-n-half Clue   3. химия   chemistry   history   biology   algebra   Half-n-half Clue   4. геология   geology   psychology   calculus   physics   Half-n-half Clue   5. ботаника   trigonometry   chemistry   botany   geography   Half-n-half Clue   6. зоология   psychology   physics   zoology   geometry   Half-n-half Clue   7. география   geology   biology   geography   chemistry   Half-n-half Clue