Some functions ...
plot(sin(-x)*pow(1.5,-r))
plot(pow(2,sin(y))*pow(2,sin(x))/12)
plot(sin(x*y/10)/10)
plot(sin(r)/r)
plot(tanh(x)+tanh(y))/3
plot((1/sqrt(2*pi))*e^(-(r^2)/2))
clear
helpful()
tan(x) Tan returns the tangent of the radian argument x.
floor(x) Floor returns the greatest integer value less than or equal to x.
inf(x) Inf returns positive infinity if sign >= 0, negative infinity if sign < 0.
log1p(x) Log1p returns the natural logarithm of 1 plus its argument x.
It is more accurate than Log(1 + x) when x is near zero.
min(x, y) Min returns the smaller of x or y.
pow(x, y) Pow returns x**y, the base-x exponential of y.
remainder(x, y) Remainder returns the IEEE 754 floating-point remainder of x/y.
asin(x) asin returns the arcsine, in radians, of x.
asinh(x) asinh returns the inverse hyperbolic sine of x.
exp(x) Exp returns e**x, the base-e exponential of x.
expm1(x) Expm1 returns e**x - 1, the base-e exponential of x minus 1.
It is more accurate than Exp(x) - 1 when x is near zero.
J1(x) J1 returns the order-one Bessel function of the first kind.i
log2(x) Log2 returns the binary logarithm of x.
The special cases are the same as for Log.
sin(x) Sin returns the sine of the radian argument x.
cos(x) cos returns the cosin of the radian argument x.
cbrt(x) Cbrt returns the cube root of x.
Jn(x, y) Jn returns the order-n Bessel function of the first kind.
log10(x) Log10 returns the decimal logarithm of x.
The special cases are the same as for Log.
max(x, y) Max returns the larger of x or y.
pow10(x) Pow10 returns 10**n, the base-10 exponential of n.
round(x) Round returns the nearest integer, rounding half away from zero.
Yn(x, y) Yn returns the order-n Bessel function of the second kind.
acos(x) acos returns the arccosine, in radians, of x.
dim(x, y) Dim returns the maximum of x-y or 0.
gamma(x) Gamma returns the Gamma function of x.
Y0(x) Y0 returns the order-zero Bessel function of the second kind.
Y1(x) Y1 returns the order-one Bessel function of the second kind.
atanh(x) atanh returns the inverse hyperbolic tangent of x.
ldexp(x, y) Ldexp is the inverse of Frexp. It returns frac × 2**exp.
sinh(x) Sinh returns the hyperbolic sine of x.
atan(x) atan returns the arctangent, in radians, of x.
copysign(x, y) Copysign returns a value with the magnitude of x and the sign of y.
FMA(x, y, z) FMA returns x * y + z, computed with only one rounding.
(That is, FMA returns the fused multiply-add of x, y, and z.)
logb(x) Logb returns the binary exponent of x.
mod(x, y) Mod returns the floating-point remainder of x/y.  The magnitude of the
result is less than y and its sign agrees with that of x.
tanh(x) Tanh returns the hyperbolic tangent of x.
trunc(x) Trunc returns the integer value of x.
acosh(x) acosh returns the inverse hyperbolic cosine of x.
abs(x) Abs returns the absolute value of x.
ceil(x) Ceil returns the least integer value greater than or equal to x.
exp2(x) Exp2 returns 2**x, the base-2 exponential of x.
hypot(x) Hypot returns Sqrt(p*p + q*q), taking care to avoid
unnecessary overflow and underflow.
J0(x) J0 returns the order-zero Bessel function of the first kind.
atan2(x, y) atan2 returns the arc tangent of y/x, using the signs of the two to
determine the quadrant of the return value.
log(x) Log returns the natural logarithm of x.
nextafter(x, y) Nextafter returns the next representable float64 value after x towards y.
roundtoeven(x) RoundToEven returns the nearest integer, rounding ties to even.
sqrt(x) Sqrt returns the square root of x.

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