$\left(3x+2a-7\right)+\left(-11x+7a+16\right)$
$x^2-7x+12=0$
$6x+4<3x-8$
$\frac{3^{x+3}-5\left(3x\right)}{3x}$
$x+2x-2$
$\int4x\left(\frac{2}{3}x-4\right)^{\frac{1}{7}}dx$
$\frac{\sec\left(y\right)-\cos\left(y\right)}{\sec\left(y\right)}$
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