3,75-(-1,5)×(1500-300):40%

3,75 – (- 1,5) × (1.500 – 300) ÷ 40%

= 3,75 + 1,5 × 1.200 ÷ 40/100

= 3,75 + 15/10 × 1.200 × 100/40

= 3,75 + 15/10 × 3.000

= 3,75 + 15 × 300

= 3,75 + 4.500

= 4.503,75