$\cos^2\left(5x\right)-\sin^2\left(5x\right)$
$\left(5x+3x^2\right)-\left(10x-2\right)$
$x^3y^6+125$
$-x^2=5$
$-50\cdot7$
$\frac{24x^3+4x+1}{6x^4+2x^2+x}$
$tan\left(\frac{x}{2}\right)=csc\:x-cot\:x$
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