There are many math methods available in Java.
The math methods most likely to be used by students learning Java are explained in more detail here.
Math.pow(n,3) returns n to the third, or n*n*n.
Math.pow(2,4) returns 16
Math.pow(81, .5) returns 9 (the square root of 81)
Math.cbrt(8) returns 2.
Math.hypot(3,4) returns 5
The ceil method finds the nearest whole number that is >= the argument. You can think of this as moving to the right on a number line.
Math.ceil(5.8) returns 6.
Math.ceil(-5.8) returns -6.
There are also trigonometric methods: cos (cosine), sin (sine), tan (tangent), acos, (arc cosine), asin (arc sine), atan (arc tangent). All of these methods take one argument: the angle expressed in radians. There is also atan2 (arc tangent) which takes 2 parameters: x and y. It returns the arc tangent of y/x, expressed in radians.
There are hyperbolic methods: cosh (hyperbolic cosine), sinh (hyperbolic sine), tanh (hyperbolic tangent), acosh *hyperbolic cosine), asinh (arc hyperbolic sine), and atanh (arc hyperbolic tangent). All of these methods take one argument: the angle expressed in radians.
There are exponential and logarithmic methods and quite a few others.