$y=9\sec\left(\frac{1}{3}x\right)$
$\int x\cdot\left(m^{3x}\right)dx$
$-2x^4-11x^2$
$7x^4+4x^2+7x+2-6x^3+8x+3$
$4x^2\:-\:14x^2\:$
$7\left(2x-1\right)-3=6+6x$
$\frac{z}{3}^3$
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