$-\int\left(\sin\left(x\right)\cdot\sec\left(x\right)\right)dx$

$2\left(4m+n\right)_{-\left(5m+3n\right)}$

$2\cos^2\left(x\right)-\sin^2\left(x\right)=1$

$\left(-7+2-5\right)^2-\sqrt{\left(7+14\right)}.\left(-7-5\right)-\sqrt[18]{25}^9$

$x-2-25$

$\frac { x ^ { 2 } - 16 } { x ^ { 2 } + 8 x + 16 }$

$\int_{-3}^3\left(x^33x^2+2x\right)dx$