$\left(3x^2+4z^4\right)^2$
$-\left(-5-4+3\right)\:-\:\left(-1+5\right)$
$8cos^2x=16cosx$
$60\cdot831$
$n^2+15n+43=0$
$5x^4y^3-x^2y^3+8x^2y^3-12x^4y^3$
$\lim_{x\to1}\left(\frac{\sin\left(x\right)\frac{\pi}{x}}{x-1}\right)$
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