pkg math/cmplx, func Tanh(complex128) complex128
pkg math/rand, func ExpFloat64() float64
pkg math/rand, func Float32() float32
pkg math/rand, func Float64() float64
pkg math/rand, func Int() int
pkg math/rand, func Int31() int32
pkg math/rand, func Int31n(int32) int32
pkg math/rand, func Int63() int64
pkg math/rand, func Int63n(int64) int64
pkg math/rand, func Intn(int) int
pkg math/rand, func New(Source) *Rand