4cos2x+cosx−54cos^2x+cosx-54cos2x+cosx−5
ddx(4x2−6x−5)\frac{d}{dx}\left(4x^2-6x-5\right)dxd(4x2−6x−5)
16a2−40a+2516a^2-40a+2516a2−40a+25
2(−3)4+ (−3)3+ 15(−3)2+ 9(−3) − 272\left(-3\right)^4+\:\left(-3\right)^3+\:15\left(-3\right)^2+\:9\left(-3\right)\:-\:272(−3)4+(−3)3+15(−3)2+9(−3)−27
37−x<3537-x<3537−x<35
2(−2)2+3(−1)3−2(−3)2\left(-2\right)^2+3\left(-1\right)^3-2\left(-3\right)2(−2)2+3(−1)3−2(−3)
3x2−18x−81=−63x^2-18x-81=-63x2−18x−81=−6
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