他的同学们正在绞尽脑汁地演算初等代数题.用英语怎么说？

他的同学们正在绞尽脑汁地演算初等代数题.

His classmates were labouring with elementary algebra.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

classmates

n. （同班）同学( classmate的名词复数 )，砚兄砚弟；

例句
...the young women whom his classmates thought most desirable.
他的同班同学认为最性感的年轻女子

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

labouring

n. 劳动，操劳；

例句
It is still labouring under the debt burden that it was encumbered with in the 1980s.
它现在仍旧被20世纪80年代就深受其累的债务压得喘不过气。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

elementary

adj. 基本的，初级的，[化]元素的，初等；

例句
A proton is an elementary particle of matter.
质子是物质的基本粒子。

algebra

n. 代数学，代数；

例句
He would allow John slyly to copy his answers to impossibly difficult algebra questions...
他会让约翰偷偷抄下自己对一些极难的代数题的解答。