What is the error on the subject-verb agreement?

modern calculators, which can compute sums almost instantaneously, derives from abacuses, hand operated devices with beads that slide along rods.

gilgamesh is an epic hero from birth, as he's brought to the world by the hand of several gods who shaped him with the goal of saving humanity. there's a passage from the text that reads "the glorious sun shamash bestowed upon him glory; adad the terrible god of storms bestowed upon him courage. the great gods perfected his magnificence beyond all others, terrible like the great wild bull". this is a great example that show some of the super-human qualities that the gods gave gilgamesh upon his birth.

as gilgamesh grows he has to face many challenges that put his heroism to task. the courage he displays along the way, prove that he's ready to live up to the godly qualities brought upon him. at one point he has to overcome a wild beast by the name of hubamba "whose roar is a flood, whose mouth is fire, whose breath is death", as the text reads. the actions taken by gilgamesh, beating the beast with the use of his super-human force, examplify why he shoud be thought of as an epic hero.

hope this !

hi there!

one thousand and one nights, also called the arabian nights is a collection of middle eastern tales compiled in arabic during the islamic golden age, dated from the 8th to the 14th century. this collection was compiled of largely middle eastern and indian stories with an uncertain date and autorship whose tales such as aladdin, ali baba and sinbad the sailor -these ones were the most popular ones, the ones that have almost become part of western folklore.

as in much medieval european literature, the stories contained in this collection are set within a frame story. its scene is central asia, as known as "the islands or peninsulae of india and china", where king shahryar kills his wife after discovering her infidelities and as well as any other who betrayed him.   then, loathing all womankind, he marries and kills his new wife each day until no more candidates could have been found. his vizier had two daughters, scheherezade and dunyazad. the elder one -scheherezade- having devised a scheme to save herself and the others insisted that her father needed to give her in marriage to the king. each evening, she used to tell a story leaving it incomplete and promising to finish it the following night. the stories kept the king very interested, so eager to hear evey ending of each story, that he puts off her execution from day to day and finally he decided to give up with his plan. these stories are contained within the collection of 1001 nights, the bulk of the text is in prose, although verse is usually used for songs and riddles to express better the heightened emotion of them.