$\lim_{x\to4}\left(\frac{\sqrt{x+3}-1}{x-4}\right)$
$f\left(x\right)=\:3x^3-4x+5x-4$
$\left(45-237\right)+\:\left(-36+85-203\right)-\left(249+1502\right)+33$
$\frac{sinx}{cos^3x-cosx}$
$438.464-150.4-31.342$
$\int\frac{\left(2x-5\right)}{\sqrt{5-x^2}}dx$
$\left(5x\:-\:2\:\right)\left(x^2\:+\:6x\:-\:4\right)$
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