A=∫2121+5(1+3x−2x2−x1)dx
A=[x+23x2−32x3−lnx]2121+5
A=21+5+23(21+5)2−32(21+5)3−ln(21+5)
−21−23(41)+32(81)+ln(21)
A=21+25+83+435+815−34−325
−21−83+121−ln(1+5)
=5(21+43−32)+815−34+121−ln(1+5)
=24145+2415−ln(1+5)
ℓ+m+n=30