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-2a-11b-c+5= -2*(-6)-11*3-(-1)+5=12-33+1+5=-33+18=-15
2. -(3-2x+4x^2)+(1-3x-6x^2)= -3-2x+4x^2+1-3x-6x^2= -2-5x-2x^2=-2-5*(-3)-2*(-3)^2= -2-5*(-3)-2*9= -2+15-18=-5
Mam nadzieję, że pomogłam ;)