$\left(cos\:x\right)\left(tan\:x\:+\:sin\:x\:cot\:x\right)=sin\:x\:+\:cos^2\:x$
$\lim_{x\to0}\left(\frac{x^2-\sin^2\left(x\right)}{x\sin\left(x\right)}\right)$
$12x+6x^2;x=0$
$wx+nx+yw+yn$
$a^2x+a^2y+b^2x+b^2y$
$1365\cdot81z^4\cdot m^{11}$
$\ln\cdot\left(\ln\cdot\left(2x+3\right)\right)$
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