$\frac{xsenx}{cosx}$
$3sin^25x-3cos^25x$
$\frac{\left(x^2+3x+2\right)}{4x-3}\ge-2$
$\int\frac{x^5-x^4+x-2}{x-1}dx$
$\cos\left(-240\right)=\sin\left(30\right)$
$x^3-4x^2+6x$
$.01\left(5x+6\right)^2$
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