Subtract: 543x-243x

Subtract: $-512x^2yz^2-752x^2y-515x^2y-61xy^2z-727x^2yz^2-349xy^2z$

Subtract: -212x-34x

Subtract: 3415x⁴-3737x²-6171x-1780x²-1529x⁴-627x

Subtract: 362x²-3x²-671x²-31x

Subtract: $5x-24x^2-257x^2-5617x^2$

Subtract: $982x^2-617y^2-423x^2-952y^2-123x^3-567y^3$

Subtract: 4444x³-444x³-44x³-4x³

Subtract: -5171x³-1881x⁷-216x³-187x²-9187x⁷

Subtract: 134xy²-72x² y-144x² y-121xy²-169x² y²-81xy-64xy