1x(-10-3x)=
x * (-10 - 3x)=
-10x - 3[tex]x^{2}[/tex]
==========
(4x-7)×3+10x =
12x - 21 + 10x =
22x - 21
==========
15y+(3y-1)=
15y + 3y - 1
18y - 1
==========
(10a-25b)÷5+24
[tex]\frac{10a - 25b}{5}[/tex] + 24
[tex]\frac{5(2a - 5b)}{5}[/tex] + 24
2a - 5b +24
