2/3可以读作 two-thirds
-5/4 可以读作 minus five over four 或者 minus five fourths

根号2 读作 square root of two
a plus b a加b
a minus b 表示 a减b

a times b a乘b 也可以读作 multiply a by b the product of a and b

a over b a除以b the quotient of a and b

a的p次方 a to the p-th power
2的负3次方 two to the minus third power