$x^2-4x-12=-7$

$\cot^2u$

$75\cdot5$

$\int_1^8\left(\frac{\left(2x\right)}{\left(1+x^4\right)}\right)dx$

$\left(5-45\right)-\left(-10-60\right)$

$\sin\left(x\right)\sec\left(x\right)^2-\sin\left(x\right)=\sec\left(x\right)\tan\left(x\right)$

$-\:8\:+\:\left(\:2\right)\:-\:\left(-\:3\right)\:\:$