please bantu yaa gk ngerti cara kerjanya jadi

(18/x^2+3x - (4/x) +(10/x+3)
{(18/(x^2+3x)} - {4(x+3)/(x^2+3x)} +{(10x)/(x^2+3x)}
=(18-4x-12+10!)/(x^2+3x)
=(6x+5)/(x`2+3x)