(4576+ 3286+ 5639)÷(712+415 + 212)=?

If 45 – [ 28 – {37 – (15 - *)}] = 58, then * is equal to:

4.59 x 1.8 ÷3.6 + 5.4 of 1/9 – 1/5 =?

(47.5*6* 8) ÷ 12-38=?

If (2a + 3b)(2c – 3d) - (2a – 3b)(2c + 3d), then :

 (26.3x 12x 20)÷3+125=?

√(12X 148÷8+21-74)= ?

675.456 + 12.492 X 55.671 = ?

(0.04)²÷ (0.008)*(0.2)? = (0.2)^?

5800 ÷ (32x 14.5) =?