$\sin\left(5x\right)=0.8$
$-3\left(5p+7\right)-2\left(4p-7\right)-4p$
$n-2=-2$
$\:1-cos\left(2x\right)+2cos^2\left(x\right)$
$4y^2-8y^4+6y^3$
$120+85+45$
$\left(-4x+\frac{21}{10}\right)^2$
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