Math

ceil(@num) Rounds up to the next highest integer.
floor(@num) Rounds down to the next lowest integer.
percentage(@num) Converts a floating point number into a percentage string.
round(@num) Applies rounding.
sqrt(@num) Calculates square root of a number. Keeps units as they are.
abs(@num) Calculates absolute value of a number. Keeps units as they are.
sin(@num) Calculates sine function.
asin(@num) Calculates arcsine (inverse of sine) function.
cos(@num) Calculates cosine function.
acos(@num) Calculates arccosine (inverse of cosine) function.
tan(@num) Calculates tangent function.
atan(@num) Calculates arctangent (inverse of tangent) function.
pi() Returns π (pi).
pow(@num1,@num2) Returns the value of the first argument raised to the power of the second argument.
mod(@num1,@num2) Returns the value of the first argument modulus second argument.
min(@num1,@num2,......) Returns the lowest of one or more values.
max(@num1,@num2,......) Returns the highest of one or more values.

.a:after{
   content: round(sqrt(pow(2,3.5))) asin(sin(pi()));
}

.a:after {
  content: 3 0rad;
}