$5894 \div 15.01 + 590.01 - 111.98 = ?$

$46818 + 34484 - 24642 - 21232 = ?$

$9999 + 8888 + 777 + ? = 19700$

$\frac{1}{4}$ of a number subtracted from $\frac{1}{3}$ of the same number gives $12$. The number is:

$\left[(7.99)^{2}-(13.001)^{2}+(4.01)^{3}\right]^{2}=?$

$(21.5 \% \text{ of } 999)^{1/3} + (42 \% \text{ of } 601)^{1/2} + ? = 28$ (Assuming the equation equals $28$ for a standard evaluation)