$-cos^2x\left(sec^2x-1\right)$
$3x^2-34x+70>0$
$\left(x+3\right)\left(x+2\right)\left(x+1\right)+\left(x+2\right)\left(x+1\right)+\left(x+1\right)$
$\left(ab^2\right)^5\left(c^5\right)^4$
$\int_{-3}^1\left(e^{-x}-x\right)dx$
$2x^3-21x^2+27x=0$
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