Subtract the polynomials and simplify the result completely: (−5x5−10x3−4x−7)−(−8x5−10x4+12x3−1)\displaystyle {\left(-{5}{x}^{{5}}-{10}{x}^{{3}}-{4}{x}-{7}\right)}-{\left(-{8}{x}^{{5}}-{10}{x}^{{4}}+{12}{x}^{{3}}-{1}\right)}(−5x5−10x3−4x−7)−(−8x5−10x4+12x3−1)
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