Which of the following is an example of narrow or weak

What will come in the place of question mark (?) in the given expression?

√1936 + (84 ÷ 2 × 1.5) – 35² + 18² = ?

Simplify the expression and find the value of 'x'

35% of 500 of 18 ÷ 21 = x

Find the value of ‘x’ if (5 × 196 – 340 ÷ 17) ÷ 20 = √1600 – x.

1440 ÷ 12 + 540 ÷ √36 + ? = 180 * 3

779 + 136 – 334 = 270 + 121 + ?

162 ÷ [51 – {29 – (9 – 6̅ ̅+̅ ̅7̅ )}]=?

If 14 ^{(x - y)}  = 2744 and 14 ^{(x + y)} = 537824, what is the value of x?

? = 15% of 2400 + 140% of 4200 – 12 ³ 

13/3 – (23/6) = ? – (22/9)