Как решить #836(5,6) ,#837 помогите пожалуйста

836(5,6) (81*12)/(24*45)=(9*9*12)/(12*2*9*5)=9/(2*5)=9/10 (56*16)/(48*49)=(8*7*16)/(16*3*7*7)=8/(3*7)=8/21 837. (35+28)/(35-28)= (7*(5+4)) /(7*(5-4))=(5+4)/(5-4)=9 (75-33)/(75+33)=(3*(25-11)) / (3*(25+11))=(25-11)/(25+11)=14/36=7/18 (24+3)/(24-3)=(3*(8+1)) / (3*(8-1))=(8+1)/(8-1)=9/6=1 1/2 (15-6)/(15*6)=(3*(5-2)) / (3*5*6)=(5-2)/(5*6)=3/(5*3*2)=1/(5*2)=1/10 (12*3)/(12+3)=(12*3)/(3*(4+1))=12/5=2 2/5 (26+2)/(26*2)=(2*(13+1)) / (26*2)=14/26=(2*7)/(2*13)=7/13