$7x>-14$
$\frac{\sin\left(x\right)^2}{\cos\left(x\right)^2+3\cos\left(x\right)+2}$
$9x^2+12x=45$
$\ln\left(y\right)\frac{dx}{dy}+2x^2\ln\left(x\right)=0$
$-\frac{3}{7}a^2b+a^2b$
$x^4\cdot x^6$
$\left(7^5\right)^{\left(-3\right)}$
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