$\left(4a^3b^2c^2+3a^2b^3c^3\right)^3$
$\lim_{x\to3}\left(\frac{\sqrt{x+4}-1}{x+3}\right)$
$cos\left(3x\right)-1=0$
$19=3t+4$
$x^2+34x+289$
$x+2\cdot2x+1$
$-2\pi\sin\left(\frac{\pi}{2}\right)\left(1+2n\right)$
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