If p = 8.15, q = 9.06 and r = −17.21, then the value of p³+q³+r³-3pqr

if $${x\over 9}+{8\over x}=1$$, then the value of x³ is :

If  $${{(17)^3-(7)^3}\over (17^2+7^2+k)}=10 $$ , then what is the value of k?

If $${{k^2}\over {k^2-2k+1}}={1\over 6}$$, then what is the value of $${1\over k^3}+k3$$ ?

What should come in place of the question mark (?) in the following mathematical statement?
$${{?^6÷16=108}}$$

Simplify the following expression.
12 + 2.5 + (1.5 of 4) - 2.6

What is the value of y in the following equation?
(1÷23) of [2{3 + 4(35 + 7)}] = y

After interchanging the given two signs, what will be the value of the following expression?

× And ÷

20 + 5 ÷ 6 × 2 – 5