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

 If $${1\over 4.263}=0.2346$$, find the value of $${1\over0.0004263}.$$

The value of $$5-{8+2\sqrt{15} \over4}-{{1}\over8+2\sqrt{15}}$$ is equal to:

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

158.25 x 4.6 + 21% of 847+?= 950.935045

Evaluate the following:
5 - [96 ÷ 4 of 3 - (16 - 55 ÷ 5)]

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

468.02 + 79.91 ÷ 5.01 = ?²

$$ 11^{2}-4096^{1\over 4}+100^{1\over2}=?$$