Write a mathematical problem for the following using brackets.
From the product of $23$ and $2$, subtract the sum of $11$ and $15$.

Simplify the following.

$20\times 4-10+75÷15$

Simplify the following.

$10+10\text{ of }10+10÷10-10\times 1$

Simplify the following.

$56-10\text{ of }4+8$

Simplify the following.

$28-5\times 6+2$

Evaluate the following.

$10-(3+10÷5)$

Evaluate the following.