$xy'\:+\:3y\:=\:3x^2+4$
$7-10^2$
$x^2+2x=-14$
$-1.3+-1.4$
$\left(x^2-b\right)^2$
$\lim_{x\to\infty}\left(\frac{\left(x+1\right)\ln\left(x+1\right)}{x\ln\left(x+2\right)}\right)^4$
$2\left(\cos\left(0.5x\right)\right)^2=1$
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