$4sin^2\left(x\right)=1+4cos\left(x\right)$
$2sin\left(x+\frac{\pi\:}{2}\right)-cos\left(x\right)=1$
$\lim_{x\to4}\left(\frac{x+8}{x-4}\right)$
$i=prt$
$42-18-36-15-10+5-21+36+2-11$
$\lim_{x\to0}\left(\frac{2-\left(4-x\right)^{-\frac{1}{2}}}{\sin\left(2x\right)}\right)$
$\int8x\left(4x^2+8\right)^2dx$
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