fully simplify 9k+7-5k-3-4
3/8 divided by 5/4
factorize the expression x^2-2hx+h^2
18 divided by 8/3
fully simplify 9f+5r-3f+4w-2r+3w
2/7 divided by 3/7
10 - (3.5 + 1/2)
5 2/5 as improper fraction
2,8,16,26 in quadratic sequence
x power 1/3 times x power 2/3
