Помогите очень сильно прошу умоляю

1)-0.8x*(-0.7)=0.56x
2) $\frac{8x}{5}*(- \frac{15y}{32} )=- \frac{3xy}{4}$
3)-7(5-a-4b)=-35+7a+28b
4)-0.6x(-5+3m-1.4n)=3x-1.8mx+0.84nx
5)=46x-42x=4x
6)=-0.2p-1.2-2.9d
7)=116x-87y-120y+72x=188x-207y
8)=2.4x-7.2-2x+2.8=0.4x-44
2)= $\frac{ \frac{2,5*(13+19)}{19} - \frac{4.9*15}{19} }{ \frac{650}{475}- \frac{1}{19} }$
= $\frac{ \frac{80-73.5}{19} }{ \frac{26-1}{19} }= \frac{80-73.5}{26-1}= \frac{6.5}{25} = \frac{6.5*4}{25*4}= \frac{26}{100} =0.26$
1)= $\frac{8*21}{21}+ \frac{1*21}{3} - \frac{5*21}{7} = 8+7-15=0$