4[a²-1-(3a-2/2)]-15[(2a²-5)/3-(a-3)/5
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4[a²-1-(3a-2/2)]-15[(2a²-5)/3-(a-3)/5
4[a²-1-(3a-2/2)]-15[(2a²-5)/3-(a-3)/5
4[a²-1-(3a-2/2)]-15[(2a²-5)/3-(a-3)/5
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4[a²-1-(3a-2/2)]-15[(2a²-5)/3-(a-3)/5
=4a²-4-4(3a-2/2)-5(2a²-5)-3(a-3)
=4a²-4-2(3a-2)-(10a²-25)-(3a-9)
=4a²-4-6a+4-10a²+25-3a+9
=-6a²-9a+34