What approximate value should come in place of the question mark (?) in the following questions?

Find the approximate value of:
​$$\frac{76.91 × 143.97}{7.07 × 12.01} - \frac{3.93^2 × \sqrt{195.88}}{6.93 × 8.03^{\frac{1}{3}}}$$​​

​$$\sqrt{201\frac{49}{100000}+49\frac{1}{10000}-\frac{5}{1000}+6\frac{45}{10000}}=x$$​
Find the approximate value of $$x^2$$​ ?

​$$\frac{779.23}{13} + 4.98 + 23 = \frac{x}{100} \times 60.03$$​​

What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value)
29.99% of 400 + √194 = ? - ∛120

What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value)
6.09³ + 9.99% of 400.1 = ? × 2.11²

What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value)
(4.12²× 11.99) + ? = 45.22% of 5000

What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value)
3/7th of 83 + ? = 234.99 × 2.99

1259.909 ÷ 12.106 ÷ 6.979 + 37.8982 – 29.9023 = ?