165 Calculer :
a. 5-2 x (-3 +2× (-5))
0,1-2+(2,5-3×7)×2
b.
c. -2-3x
2/5 +3²)
d. -2+3x (-2-(-3 + 2x (-3)³) - 2 × (-3))
7-3x(-5)
-3-4x(+2)