( sinus of x squared minus co sinus of e of x squared ) divide by (( sinus of x to the power of 4 plus co sinus of e of x to the power of 4))
( sinus of x to the power of two minus co sinus of e of x to the power of two) divide by (( sinus of x to the power of four plus co sinus of e of x to the power of four))
(sinx2-cosx2)/((sinx4+cosx4))
sinx2-cosx2/sinx4+cosx4
(sinx²-cosx²)/((sinx⁴+cosx⁴))
(sinx to the power of 2-cosx to the power of 2)/((sinx to the power of 4+cosx to the power of 4))