$\lim_{x\to\infty}30-5x$
$-\left(14-7x\right)$
$x+12x+35$
$49c^2+56c+16$
$25x^{4}+100x^{2}y^{3}+100y^{6}$
$5x^2=15x$
$\int_3^4\frac{1}{\sqrt{16-x^4}}\:dx$
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