$\int\frac{x+1}{x^2+3x-2}dx$
$\lim_{x\to4}\left(sin^2\left(\:\pi x\right)cos\left(\frac{1}{x^2-4x}\right)\right)$
$\left|2-3\left(1+4\right)-3\right|4$
$37+87-12$
$\sqrt[4]{6x^4+7x^2}$
$30-10-12\:-5\:\:20$
$-4x^2-8x-7=0$
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