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2.5a+5b
3.2x+5y
4.11 x(pngkt 2)+(-9x)
=12a
2.(7-2)a+5b
=5a+5b
3(.5x+7y) - (-3x-2y)
=(5+3)x + (7y+2y)
=8x + 9y
4. (7+4)x²+(-6-3)x
=11x ²- 9x