5x13-5x3 = 5x(13-3)=5x10=50
19+19x9 = 19x (1+9) = 19x10=190
23x11-23 = 23x(11-1)=23x10=230
7x8+2x7+10x7 = 7x(8+2+7)=7x17=119
41x132-41x32 = 41x(132-32) = 41x100=4100
37x28+42x37-37x15 = 37x(28+42-15)=37x55=2035
27x8+2x27+27x10 = 27x(8+2+10)=27x20=540
8x49+8x31-8x50 = 8x(49+31-50)=8x30=240
15x99+15x13-15x112 = 15x(99+13-112)=15x0=0
25x13+25x8-25x11=25x(13+8-11)=25x10=250
