$\frac{cos\:xsin^2x}{1+cos\:x}=cos\:x-cos^2\:x$
$+5x+6>7x+4$
$3x^2-5x+8$
$\left(x^4y^2z^6\right)\left(xy^5z^0\right)$
$\left(2x^3-y\right)^4$
$y^2-5y-14$
$\left(m^4\right)^0$
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