$a^2+12a-54=0$
$4\cdot10^8$
$-5senx+2=0$
$35x^2+24x-35$
$\left(xy-x^2y^2+x^3y^3\right)^2$
$2.\left(1-cos^2a\right)+cos^2a=1+sen^2a$
$\sqrt{\frac{3+1}{3-1}}$
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