A) 2a+3b-c-4a-3b+2a= b) xy+3x-y+1-2xy-2x+x+1= c) x²+2xy-3y²-2x²-y²-x²+2xy d) 1/6t²+1/3k²t+1/3tk²-k²t+1/2t²-1/6tk²= e) u²v²+1/4uv-1/7u²v²-uv-1/2uv+u²v²= plis to na jutro

a) 2a+3b - c - 4a - 3b+2a= - c b) xy+3x - y+1-2xy - 2x+x+1= 2x - y - xy + 2 c) x²+2xy - 3y² - 2x² - y² - x²+2xy =  - 2x²  - 4y² + 4xy d) 1/6t²+1/3k²t+1/3tk² - k²t+1/2t² - 1/6tk²= 1/6 t² + 1/3 k² t + 2/6 tk² - k² t + 3/6t² - 1/6tk² = 4/6 t²  - 2/3 k² t  + 1/6 tk² = 2/3 t² - 2/3 k²t + 1/6 tk² e) u²v²+1/4uv - 1/7u²v² - uv - 1/2uv+u²v²= 1  6/7 u² v²  + 1/4 uv - uv - 2/4uv= 1  6/7 u² v² - 1  1/4 uv