pls..dijawab ya sederhanakan bentuk² aljabar tersebut.

a. 4b+5a-7b-2a-3b
= -3b+3a-3b
=-6b+3a
b.3p+2q+1-2p+4q+6
=p+6q+7
c.2m(4m-3)-3(m-2n)
=8m²-6m-3m+6n
=8m²-9m+6n
d.7y+3x(4y-x)-5y(1-x)
=7y+12xy-3x²-5y+5xy
=-3x²+17xy+2y

Semoga membantu ^-^