$\frac{d}{dx}y^2=x^3-6x+4\:cos\:y$
$7ab+4ab-3ab$
$\int\frac{1}{2+2x+x^2}dx$
$18.890+9.78+0.8$
$\int\left(x^2-x\right)e^{-x}dx$
$3x-8y-2z\:+\:7x+3y+z$
$3.14\left(\frac{5}{6}\right)^2\left(\frac{16}{5}\right)$
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