How to calculate x + (x + 14) + (x + 14) △ 2 × 3 + (x + 14) △ 2 × 4 = 360

How to calculate x + (x + 14) + (x + 14) △ 2 × 3 + (x + 14) △ 2 × 4 = 360


Original formula = x + (x + 14) + (x + 14) * 1 / 2 * 3 + (x + 14) * 2
=x+(x+14)*(1+3/2+2)
=x+(x+14)*9/2
=x+9/2x+63
=11/2x+63