$4sen^2a-8sena+3=0$
$\frac{3sin^2\left(x\right)}{2tan^2\left(x\right)}$
$-5y^2-3x-6x^2-4x$
$sin^2\left(\frac{7}{10}\right)+cos^2\left(t\right)=1$
$\left(3a^{2+x}b^{3+2x}\right)\left(-a^3b^4\right)^{-x}$
$120^0$
$r+\frac{3}{5}r=\frac{2}{5}r$
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