1.   And while many of the students barely learned to read and write in high school, here they must master the complexities of computers and geometric equations.

2.   He seems never to have mastered the complexities of bel canto fioritura.

3.   He understood that thinking responsibly in modern democratic society means mastering the complexities of that society and putting oneself in the shoes of those who must make decisions.

4.   In all, it was an assured appearance that should give citizens a sense that their president has done much to master the complexities of this new global crisis.

5.   Mrs. Clinton mastered the complexities of health insurance, and she dazzled Congress with her command of facts and figures.

6.   The book is a crucial guide to how criminals have corrupted public officials, used the latest in technology and armaments, mastered the complexities of laundering money.

7.   Alexei Nemov, a world champion who has mastered the complexities of gymnastics, has confessed to problems handling chopsticks.