$27x^2-75$

$\int x^3+x^2+x+1\left(e^x\right)dx$

$y'=e^{6\cdot x+5\cdot y}$

$\int_2^{\infty}\left(3-\frac{12}{\left(x+2\right)^2}\right)dx$

$\left(-6\right)\left(-3\right)\left(-\frac{3}{4}\right)\left(-0.2\right)\left(-1\right)$

$\left(+\sqrt{2}\right)\left(-\sqrt{2}\right)$

$2x^4\:-\:x^4\:+\:5^4$