-3 3/4 - (-8 2/9 - (-4,5) : 9/14) • 2 1/4 = -15/4-(-74/9+4,5*14/9)*9/4=-15/4-(-74/9+9/2*14/9)*9/4=-15/4-(-74/9+1/2*14)*9/4=-15/4-(-74/9+7)*9/4= -15/4-(-11/9)*9/4=-15/4+11/9*9/4= -15/4+11*1/4= -15/4+11/4= -1