$2x\:-1\:\le\:-3$
$\int\left(\frac{\sin\left(x\right)}{\sqrt{1-4\cos^2\left(x\right)}}\right)dx$
$\left[x\:+\:\left(y\:-\:4\right)\right]\left[3x\:+\:\left(2y\:+\:1\right)\right]$
$-\left(x-7y\right)-2\left(-y-5x\right)$
$\left(e^x+e^{-x}\right)\frac{dx}{dy}=y^2$
$2c^2+7c+3=0$
$5+x<-1$
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