$\int\left(-7x^3e^{-4x^4+1}\right)dx$
$-x^2+7x=0$
$4+3\:x\:-2-8+2$
$\lim_{x\to0}\left(x\cdot ln\left(sinx\right)\right)$
$8\sin^2x+7\cos^2x=0$
$\lim_{x\to\infty}\left(ln\:\frac{x^2-4x\:+\:4}{x^2-x-2}\right)$
$12x^0\left(x-4\right)x=6$
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