$5a^{7}b^{2}-3a^{4}b^{2}+10ax$
$\lim_{x\to0}\left(1+\tan\left(\sqrt{x}\right)^2\right)^{\frac{1}{x}}$
$c^2+8c+9$
$3x^2-7x+12=0$
$2\cdot sen\left(x\right)-\frac{1}{\left(cos\left(x\right)\right)}=0$
$\left(x^2+a^2\right)^2$
$\frac{2x^2-x}{2x^3-3}$
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