Efectuați, reducând termenii asemenea:
a) 2a-(-3a)+(-5a)-b-(-b)
b) ⅓ab-(-a²) -a²-⅓ab
c) (2a+3)+(2a-3)-(2a+1)-(-3a+2)
d) (2x+3y)+(-4x+5y-1)-(-3x+8y-4)
e) x³-5x²+2x-7-(x³+4x-1)+(x²+6x+2)
f) (x+2y-4)-(3x-y-5)-3y
g) -(1/8x³-1/4x²-3x+5)+(1/8x³+3/4x²-3x+1)
h) (-2x²+x-5)-(-x²+3x-2)+(x²-x-9)
i) (2x+rad3y)+(-4+2rad3y-1)-(3x+3rad3y-4)
j) (x+y+z)+(x-y+z)-(x+y-z)-(x-y-z)
k) (a³+a²+a+1)-(a³-a²+a-1)-(2a²+2)
Am nevoie urgent!!​