$2\sin\:^2\left(x\right)-\sin\:\left(x\right)-1=\frac{\pi\:}{8}$
$p'=p-p^2$
$-10-3\cdot7$
$y=ln\frac{14x}{3x^2+1}$
$8x^2-5x-2$
$x^2+3x+81$
$16x^6-2x^2y^2+\:\frac{y^4}{16}$
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