终于知道数学符号用英语咋念了

微积分术语的英文念法

函数 f of x

极限 the limit as x approaches 0 of

单侧极限 the limit as x approaches 0 from the left/right of

the limit as x approaches 0 from the more negative/positive side of

立方根 the cube root of

指数 e to x

在某处求值 evaluated at x=0

对数 log base a of x

分式 numerator over denominator

高阶微分 nth derivative of y with respect to x

二阶微分(d/dx形式) d squared y over dx squared

导数的撇号形式 f (double/triple) prime of x

定积分 the integral from (lower limit) to (upper limit) of

不定积分 the integral of x dx

下标（x1） x sub 1

求和 the sum from i equals 1 to n