$9x^4+13x^2-23x+49\:para\:x=5$

$8xy^2-3xy^2$

$y=cot^3xsec^4x$

$x^2\ln\left(x\right)dx=\frac{\left(y+1\right)^2}{y}dy$

$w2+21w+\left(\frac{442}{4}\right)$

$\left|+3+64\right|+\left|+6+192\right|$

$\lim_{x\to0}\left(2sin\left(9x\right)ln\left(9x\right)\right)$