$\left(cos\:30^{\circ}\:+\:cos\:45^{\circ}\right)\left(cos\:30^{\circ}\:-\:cos\:45^{\circ}\right)$
$m=\pi\left(x^4-x^4\right)\left(x\right)$
$\lim_{x\to-1}\left(\frac{x^2}{\:ln\left(x+2\right)}\right)$
$\frac{\sin\left(x\right)}{1+\cos\left(2x\right)}$
$_+81^1 y^2$
$6x^2+2x+6\:para\:x=1$
$1^2-7\cdot1+10$
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