Упростите выражение:
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1)(c+2)(c-3)-(c+2)(c+3)=(c+2)*(c-3-(c+3))=(c+2)*(c-3-c-3)=(c+2)*(-6)=-6c-12
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2)(p+4)(p-11)+(p+6)²=p²-11p+4p-44+p²+12p+36=2p²+5p-8
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3)3(x-5)²-(8x²-10x)=3(x²-10x+25)-8x²+10x=3x²-30x+75-8x²+10x=-5x-20x+75
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4)7(2y-5)²-2(7y-1)²=7(4y²-10y+25)-2(49y²-14y+1)=28y²-150y+175-98y²+28y-2=-70y²-112y+173
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